https://www.happresearch.com/blog daily 0.75 2018-05-25 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519328432112-P0Z2GOWZ4PMPJ3KVB1XF/Presentation1.png Show All https://www.happresearch.com/blog/2018/5/24/operations-regulatory-approval-faa monthly 0.5 2018-06-27 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527216155288-MSFFITKE6LSSQPKOSWDH/2018-05-24+HAPP+Flight+Plan+for+May+28.png Show All - Operations: Regulatory Approval (FAA) Example of flight path simulation submitted to the FAA. The multiple predicted paths are various runs in a Monte Carlo simulation. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527214900438-J9I9CWFQSFIV5M6GJ32H/artcc_usa.gif Show All - Operations: Regulatory Approval (FAA) United States Air Traffic Control Zones https://www.happresearch.com/blog/2018/5/18/mission-control-app monthly 0.5 2018-05-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1526699533308-2LQ2GX87G30IAF8UFZ67/IMG_5319.jpg Show All - Mission Control App: Walkthrough https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527203497725-PMV6A3VGFNDMZMIQEAVJ/google+play.png Show All - Mission Control App: Walkthrough https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1526700184370-YCLYPOKCFUHUQBRYJ9AM/Tranquility+screen+cap.jpg Show All - Mission Control App: Walkthrough https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527203482269-1AQ60CV6FADAHEOMSDHE/apple+store.png Show All - Mission Control App: Walkthrough https://www.happresearch.com/blog/2018/5/10/flight-testing-happ-t3 monthly 0.5 2018-05-11 https://www.happresearch.com/blog/2018/3/24/tranquility-app monthly 0.5 2018-05-19 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1521893890842-IXM8ZG4I8F0P9CH90HA2/Tranquility+screen+cap.jpg Show All - Mission Control App: Development https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1521894452459-UDIJ9ML71BG3JUOH8ZHU/Tranquility+team.jpg Show All - Mission Control App: Development Thanks everyone! https://www.happresearch.com/blog/2018/2/24/structures-updated-core-design monthly 0.5 2018-03-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519487508918-R16TGLXP4E8XV3DBMKD4/image-asset.png Show All - Structure: Updated Core Design HAPP core extracted from aeroshell after flight tests https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519488817370-5WSULGBXQMCN5SVJXPQ3/image-asset.png Show All - Structure: Updated Core Design The HAPP core structure https://www.happresearch.com/blog/2018/2/24/reader-summary-after-65000 monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519479525910-OAQOI2VUZDC2E706NISH/2018-02-24+Google+blog+stats.png Show All - Reader Summary after 65,000 After 22 months and 66,587 visitors https://www.happresearch.com/blog/2018/2/22/bibliography monthly 0.5 2018-02-24 https://www.happresearch.com/blog/2018/1/24/flight-testing-happ-t2 monthly 0.5 2018-03-16 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519425507150-E74TQNWDBX8VCNJIDJD4/f5.jpg Show All - Flight Testing: HAPP-T2 Damage location 2 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519425531448-3A6LFOV2GV2TAKS3VJJL/f6.jpg Show All - Flight Testing: HAPP-T2 3D-printed jigs held in place with clamps; very useful for alignment when bonding carbon fiber pieces with epoxy https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519425449501-H4YAUF3DU0ND8S9EKNI2/f3.JPG Show All - Flight Testing: HAPP-T2 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519425482689-SFHAYMQ0C3MDPSYR9NDH/f4.jpg Show All - Flight Testing: HAPP-T2 Damage location 1 https://www.happresearch.com/blog/2018/1/15/balloon-system-harness-and-tether monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424616724-85RI7VQ5QPY1IVX78LDU/b4.png Show All - Balloon System: Harness and Tether String A ties to the HAPP tether ring in the right frame. Cap B goes over a photoresistor which is not yet present at B in the right pane. Blue cylinders are the cutdown pyros. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424517905-ONZ6E33O9DX2ALRFX5HQ/b1.JPG Show All - Balloon System: Harness and Tether Hang loose, dude https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424541520-859I2MLA3WG60F97ON4Q/b2.png Show All - Balloon System: Harness and Tether Clockwise from top right: (1) Balloon neck, (2) Neck being folded, (3) Serrated inner surface of carbon fiber plate, (4) Assembled harness with steel ring. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424582200-7NRDYSOUG58OUFVPLLMT/b3.png Show All - Balloon System: Harness and Tether Left pane: Normal flight configuration; Right pane: With 3 ground tethers for test flights https://www.happresearch.com/blog/2018/1/14/balloon-system-balloon-and-helium monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424263741-00OL9E90I3MOMXG89BNJ/tanks.jpg Show All - Balloon System: Balloon and Helium Three of the four 139 cubit foot tanks provided by my local gas supplier, loaded into my SUV so you can gauge the size. Not tiny, but they're aluminum and light. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424229011-JECNG4UQAE2VDI3MNV91/ballon.jpg Show All - Balloon System: Balloon and Helium 1200 gram balloon inflated with about 13,000 liters / 460 cubic feet of helium during the first HAPP test flight https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424296326-KN5QZ6W9HW9NFO9VYDQ3/balloons+in+box.jpg Show All - Balloon System: Balloon and Helium Two 3000 gram latex weather balloons from the good folks at Scientific Sales https://www.happresearch.com/blog/2018/1/11/electronics-flight-controller-computer-fc monthly 0.5 2018-04-02 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519405360847-T6VUHLBUHHNKBUSEGZ2U/FC+image+2.jpg Show All - Electronics: Flight Controller Computer (FC) Unit #1 for development purposes https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519405396551-WLYCQOMX568LSCZYBOP5/image-asset.jpeg Show All - Electronics: Flight Controller Computer (FC) Unit #2 installed on the HAPP as flight hardware; A much cleaner layout than Unit #1 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519405415723-PRN3TFFMU9J6BVNUVW27/FC+image+3.jpg Show All - Electronics: Flight Controller Computer (FC) Autopilot (AP) on the left and Flight Controller (FC) on the right, as installed on the HAPP's Electronics Deck https://www.happresearch.com/blog/2018/1/24/flight-testing-happ-t1 monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424916880-MR8HBMNYC9HQPQ5KDFCJ/f2.png Show All - Flight Testing: HAPP-T1 Mission HAPP-T1: Success https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519424880032-1147MFRE3TFG5EXQUVJ3/f1.JPG Show All - Flight Testing: HAPP-T1 Is this an Imperial Probe Droid on Hoth or the HAPP core in a snowy field? https://www.happresearch.com/blog/2017/10/30/electronics-autopilot-computer-ap monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519405056422-XFGS8DXKX6G5LMAY9UGK/image-asset.jpeg Show All - Electronics: Autopilot Computer (AP) Yes, the "abort" button is locked out with yellow hashes because I have fat fingers https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519404999147-4SF5ELNB6T4JBED1U350/AP.jpg Show All - Electronics: Autopilot Computer (AP) Autopilot Computer based on an Arduino Mega with two custom-fabricated shields https://www.happresearch.com/blog/2017/10/2/electronics-system-architecture monthly 0.5 2018-03-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519404702222-CSIPKA52TM4QYFIFBLF6/image-asset.png Show All - Electronics: System Architecture HAPP Electronics Schema https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519404743073-RFMMCXVQKCXVZHZTZ6T3/flight+sim.jpg Show All - Electronics: System Architecture https://www.happresearch.com/blog/2018/2/15/slight-detour-to-nashville monthly 0.5 2018-03-03 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518719758862-PP1SN252XMTAQPYX275K/eclipse1.jpg Show All - Slight Detour to Nashville Sunspots and clouds. © 2017 Christopher Couch https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518719770655-31595M1VLHC5HXLYC99K/eclipse2.jpg Show All - Slight Detour to Nashville Bailey's Beads, solar flares, and mountains on the moon. © 2017 Christopher Couch https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519235590287-0QNXTSU97V1K93ID0YOE/eclipse+collage.jpg Show All - Slight Detour to Nashville Collage showing phases of the eclipse, clockwise from the top. Moment of totality and coronal highlights shown in the center. © 2017 Christopher Couch https://www.happresearch.com/blog/2017/7/31/primary-camera-test monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519403759416-FEMEQ1LG010FPDQR63N6/test_assy_2017-Jul-30_10-39-32PM-000_CustomizedView2588410722.png Show All - Primary Camera Test https://www.happresearch.com/blog/2017/7/13/upper-aeroshell-in-hyperspeed-final-video monthly 0.5 2018-03-12 https://www.happresearch.com/blog/2017/7/4/upper-aeroshell-in-hyperspeed-steps-1-2 monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519394804997-3K5X8JC8Y6L682PDOLXB/shells+b.jpg Show All - Upper Aeroshell in Hyperspeed: Steps 1 & 2 This is what we're making: One-meter diameter aeroshells. Lower shells along the wall, upper shells on the floor, HAPP structure in the middle. https://www.happresearch.com/blog/2017/5/24/els-full-system-test monthly 0.5 2018-02-24 https://www.happresearch.com/blog/2017/5/20/structure-crash-pad monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519391666958-TNYXCKLHA3ZS9VTV5VBP/EPU+3.jpg Show All - Structure: Crash Pad Clockwise from top left: (1) Holding mold in pace while foam expands; (2) Removing mold from aeroshell; (3) De-molding the foam pad; (4) Finished pad after trimming flash. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519391711683-TLOJPYXTUBDO2PYZ1DFL/EPU+4.jpg Show All - Structure: Crash Pad Left: Structure with ELS & 360 VR camera, sitting next to aeroshell. Right: Inserting structure into aeroshell. Foam pad placement is visible. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519391630402-T5QVQD9LKO1CI5L32LL5/image-asset.jpeg Show All - Structure: Crash Pad Inserting upper side of mold into bucket. Metal brackets are covered with foam tape. This whole assembly will be turned upside down during molding. Foamcore board is a little chewed up because I took this pic after de-molding 2 pads. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519391605074-WZ8LGXPHEEYAYIGC04DM/EPU.JPG Show All - Structure: Crash Pad A pinch of this, a dash of that... https://www.happresearch.com/blog/2017/6/21/recovery-cutdown-pyros monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519365445259-Q6KKC3PLQ5DG9UV5I6GJ/IMG_2915.JPG Show All - Recovery: Cutdown Pyros Cable Cutter from Prairie Twister Rocketry https://www.happresearch.com/blog/2017/5/11/tether-and-camera-mount-updated-design monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519482454280-4Y44T7O248Y5TIANR0FY/IMG_3357.JPG Show All - Tether and Camera Mount: Updated Design https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519481001240-76XY048VA7VJJMO3X435/image-asset.png Show All - Tether and Camera Mount: Updated Design New design for balloon tether. Left: FEA analysis. Right: Photo with 360 camera in place after firing the cutdown pyros. Note the bit of Kevlar string remaining. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519482375948-JD4RJ4ISRMY5NF771VXV/Chute+tether+composite.png Show All - Tether and Camera Mount: Updated Design https://www.happresearch.com/blog/2018/2/19/inspiration monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519104852794-8GD93LL1137MTCGAW62Y/IMG_0472.jpg Show All - Inspiration to the Moon and Back Pure awesomeness. © 2017 Christopher Couch https://www.happresearch.com/blog/2017/3/27/recovery-els-and-parachutes monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519332481279-B39JJBJN9V0SJ2WENRNM/image-asset.jpeg Show All - Recovery: ELS and Parachutes A tech mashup: Part Raptor, part Skycat, part home-brew, and 100% fun. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519332636466-68QRPV6KWC61N70YA0WY/image-asset.png Show All - Recovery: ELS and Parachutes Overall HAPP rendering https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519332531962-BOAMTZ9PU9HUEA14MH09/image-asset.jpeg Show All - Recovery: ELS and Parachutes Foosball table is optional for successful parachute deployment https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519332648597-8AFJCERZY7BFWSZJTJ9E/image-asset.png Show All - Recovery: ELS and Parachutes ELS shown in isolation https://www.happresearch.com/blog/2017/3/22/structure-carbon-fiber-processing monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519332923964-0BLKA4MGNUIM83U2WV22/image-asset.jpeg Show All - Structure: Carbon Fiber Processing 3D printed assembly jig on end of parachute mortar tube; ready for bonding https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519332863742-K5J216OT6S5OQ3HJCGLH/IMG_9911.jpg Show All - Structure: Carbon Fiber Processing Need more fiber in your diet? Carbon fiber, that is. https://www.happresearch.com/blog/2018/2/22/passing-35000 monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331899688-LHUVVL2RH06HV4AH287P/2017-01-31+stats+image.jpg Show All - Passing 35,000 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331949348-KGWIMRWF3CQ6QA37X2DD/french-flag.jpg Show All - Passing 35,000 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331920156-47K8H9HSIVNP0HXU6GR1/image-asset.jpeg Show All - Passing 35,000 Apu Biswas, Bangladeshi actress https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331969263-YJMJLQ54XN5VPOO68TPQ/Oman-Flag-3.jpg Show All - Passing 35,000 https://www.happresearch.com/blog/2018/2/22/capn-we-need-more-power monthly 0.5 2018-02-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331500215-2B0CO3VM1B1O3ZCD8RSQ/PC+case.jpg Show All - Cap'n, We Need More Power! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331513081-NTAD13PZL7TH5MJUW5LK/image-asset.jpeg Show All - Cap'n, We Need More Power! https://www.happresearch.com/blog/2018/2/22/tether-and-camera-mount monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331213634-BNZNX93UYX37M5DBBXFN/image-asset.png Show All - Tether and Camera Mount v1 Analysis of safety factor using finite element analysis https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331129837-O6PH9ZKEHKS3JU3X46D5/image-asset.png Show All - Tether and Camera Mount v1 Bottom view of tether / camera assembly showing blind insertion cone for 1/4"-20 bolt. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519478156762-NFXT24J8VTMOSCA6EHF8/tether+iterations.jpg Show All - Tether and Camera Mount v1 If at first you don't succeed... iterate! These are 3D-printed design versions that failed. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519331265961-8HXTQIB3WCQO0VTCDSH0/image-asset.png Show All - Tether and Camera Mount v1 Evolution of parachute arm from v1 to v7 using FEA https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519330824311-BYUFKB5BK6T4HKTZV77L/image-asset.png Show All - Tether and Camera Mount v1 https://www.happresearch.com/blog/2018/2/22/structure-redesign-for-center-of-gravity monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519330571730-3AR0ADWAW8DJJLSIWQBT/image-asset.png Show All - Structure: Redesign for CG Bonus pic: 3D-printed thruster pack and quick-connects for air hoses, mounted on the end of the jet arm https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519330523509-H8V0O4GFYA2XEU8Y1YT4/image-asset.png Show All - Structure: Redesign for CG Valves and low-pressure regulator hanging down from the Propulsion Deck. Tanks visible at bottom. https://www.happresearch.com/blog/2018/2/19/lower-aeroshell-finale-part monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061065303-PMC7HTLNU8536UZPLYN6/zzz+IMG_1366+comp.jpg Show All - Lower Aeroshell Finale: Part Clockwise from top left: Kevlar A-surface layer; 3K carbon twill; Lantor Soric foam core; 3K carbon plain weave B-surface. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061354107-U1AAKGF6XQPD0ZDLJNFD/image-asset.jpeg Show All - Lower Aeroshell Finale: Part De-molding the part https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060956894-S8FBK5RT7FL9BXJHB0VH/image-asset.jpeg Show All - Lower Aeroshell Finale: Part Finished lower aeroshell. Mold parting line is visible and will be sanded out and polished. This part is 1 meter in diameter. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061293209-9ACIIH98MLSIE8SBO30G/image-asset.jpeg Show All - Lower Aeroshell Finale: Part Decanting from the vacuum bag. Chunks of red flow media are visible. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061496784-5HM8OXNUSCEUZRNDIUBS/image-asset.jpeg Show All - Lower Aeroshell Finale: Part Aeroshell... beast mode https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061375073-Q82NLDKYIM5T9SKWTL23/image-asset.jpeg Show All - Lower Aeroshell Finale: Part Thanks for helping, John! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061012149-P3MO9JRWGIMUWNALENEY/zzz+1+IMG_1305+comp.jpg Show All - Lower Aeroshell Finale: Part Trial #1: Total failure! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061448411-GLVP08A8ZCPV0XAT6IG5/image-asset.jpeg Show All - Lower Aeroshell Finale: Part A-surface detail https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061033310-GUPXWON1Q8WH28R2PB3H/zzz+IMG_1360+comp.jpg Show All - Lower Aeroshell Finale: Part PVA drip hole and uniformly-coated mold. Mold legs were amputated to facilitate covering the entire mold with the vacuum bag. Easy come, easy go. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061265700-Z1PCSS5N7H1QI83P3ZR3/zzz+IMG_1420.JPG Show All - Lower Aeroshell Finale: Part Resin feed tubes clamped in place https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061237101-CVLHZ30VQN2VGTSHIM02/image-asset.jpeg Show All - Lower Aeroshell Finale: Part Infusion progress https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061472849-7ROA4XK2U7GKIWJOXKIG/zzz+IMG_1474.JPG Show All - Lower Aeroshell Finale: Part The lower shell goes here https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061108004-DKRDCE8WVWHU56QTEQ8G/zzz+IMG_1384.JPG Show All - Lower Aeroshell Finale: Part Working on the layup https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061171945-TKZ8LTJ27OUAS86UNPFS/image-asset.jpeg Show All - Lower Aeroshell Finale: Part 4 resin inlet ports https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061332230-3YJOZY3ZD7BEZW2K83VR/zzz+IMG_1426+comp.jpg Show All - Lower Aeroshell Finale: Part B-surface detail https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060982971-8NK9N03QYX0SVW0QLBKS/zzz+IMG_1481+%281%29.JPG Show All - Lower Aeroshell Finale: Part Lookin' like a BOSS with that Kevlar/carbon fiber weave on the A-surface https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519061131956-F38Q5C54X0USQK7UYNKF/zzz+IMG_1392.JPG Show All - Lower Aeroshell Finale: Part Nylon-wrapped spiral tubing (green) on mold lip https://www.happresearch.com/blog/2018/2/19/lower-aeroshell-part-3-composite-design monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060640913-7A6PGCV0WBN7PGGKON9B/image-asset.jpeg Show All - Lower Aeroshell Part 2.5: Composite Design Carbon fiber layup ready for vacuum infusion. Inlet (resin) and outlet (vacuum) ports are visible. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060657504-PRM50NYC8CV98TUFS2TN/zz+t1+IMG_1327.JPG Show All - Lower Aeroshell Part 2.5: Composite Design Contents of the vacuum bag: Stiff backing board (white); Carbon fiber (black); Peel ply (green) - removed after infusion; Flow media (red) - removed after; Absorbent batting (white) - removed after; Vacuum bag (purple); Tacky tape (grey) to seal the bag. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060712926-DZAPXMZKAOT7Z7UR26UR/image-asset.jpeg Show All - Lower Aeroshell Part 2.5: Composite Design Various layup combinations for testing https://www.happresearch.com/blog/2018/2/19/lower-aeroshell-part-2-mold monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060364440-2A3Y8JVWO30NE6XMCRA1/image-asset.jpeg Show All - Lower Aeroshell Part 2: Mold Doesn't look so pretty now, but just wait! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060390000-XYJLAU4KK6ORBHNRHMGG/image-asset.jpeg Show All - Lower Aeroshell Part 2: Mold Wax/PVA, orange gel coat, fiberglass https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060242180-IEHDKIAJHJ4RQTJCVH9B/z+IMG_1172.JPG Show All - Lower Aeroshell Part 2: Mold Shiny plug, ready to create the mold https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060432993-9ADCZLC2QH0HYD6ZHZ6M/z+IMG_1289.JPG Show All - Lower Aeroshell Part 2: Mold The finished mold surface. Ready for parts. The outside is ugly but the A-surface is pristine. It has it where it counts! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060268400-0Z2GL84JAAD9VLLROASZ/image-asset.jpeg Show All - Lower Aeroshell Part 2: Mold First half of mold to be formed on side opposite from the pink styrofoam https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060338255-ZUOJMLUOQ5J5PGR7CZA2/image-asset.jpeg Show All - Lower Aeroshell Part 2: Mold Tilted for a reason.... https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060411866-I6GLRF2O7VK0ATSF7V7F/z+IMG_1282+b.jpg Show All - Lower Aeroshell Part 2: Mold Bolts and legs https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060302568-BKJV9YVFO3Q9PTSYSU2Q/z+IMG_1194+b.jpg Show All - Lower Aeroshell Part 2: Mold Green slime time with PVA. The beige balls of clay are registration dots that will form features to seat with the other half of the mold. https://www.happresearch.com/blog/2018/2/19/lower-aeroshell-part-1-plug monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519060004538-ZMTAZQUR3WZIG34U2CFY/z+IMG_1149c.jpg Show All - Lower Aeroshell Part 1: Plug From the top, each row shows successive layers of gel coat with filler (reddish color) and the result after sanding to a fine finish. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059865104-DDQEGWT5RVZDN1BTR72R/image-asset.jpeg Show All - Lower Aeroshell Part 1: Plug Clockwise from top left: (1) Laying fiberglass over wood cross-sections; (2) Wetting out the glass with resin; (3) Checking glass profile versus target profile; (4) Filling out the volume with polyurethane. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059955899-Q39LYQXWFJWMY4OZ4YR9/image-asset.jpeg Show All - Lower Aeroshell Part 1: Plug Clockwise from top left: (1) Filling out the profile with clay; (2) Scraping with the wooden fixture; (3) Lots of bits after scraping! (4) Ready for coating. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059819267-TUHXUFM6CNT2X85I9S3Q/jetCmd.jpg Show All - Lower Aeroshell Part 1: Plug Giant protractors rule! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059849710-NORKFU03V2QUQVSL5MGZ/image-asset.jpeg Show All - Lower Aeroshell Part 1: Plug https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059930330-ZXWMGG6BIXVB0GI9O2SH/z+IMG_1103.JPG Show All - Lower Aeroshell Part 1: Plug Baking some tasty treats https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059907398-4I25MVB9ENCR9VFZI1JR/image-asset.jpeg Show All - Lower Aeroshell Part 1: Plug Some good, some not so much https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059839555-FE36UOFU15GLOZT5286I/image-asset.jpeg Show All - Lower Aeroshell Part 1: Plug https://www.happresearch.com/blog/2018/2/19/more-inspiration monthly 0.5 2018-02-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059534447-B0TM9Z7FAK3WYFGF3AF9/2013-02-15+Alaska.jpg Show All - More Inspiration © 2017 Christopher Couch https://www.happresearch.com/blog/2018/2/19/structure-initial-design monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519058959787-SH177D3A4BXF0J236POJ/image-asset.jpeg Show All - Structure: Initial Core Design https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059077078-99JDJCRW5PJIKG6I7YP4/IMG_0986.JPG Show All - Structure: Initial Core Design Deck 3, Electronics. There will be a total of 2 Arduino Megas and 3 LiPo packs. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059194132-H21V83UOQACOZP5MWPRG/IMG_0966.JPG Show All - Structure: Initial Core Design https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059043208-QPURJQVKJWXYK61AHUNH/IMG_0979.JPG Show All - Structure: Initial Core Design Jet nozzle attachment brackets (red anodized aluminum) https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059114366-H45FL6JIB349F34KUFZ9/IMG_0976.JPG Show All - Structure: Initial Core Design Looking at the bottom of deck 3, Electronics. LPR is strapped to the main strut. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519058916158-NQ6MG1RU70AZH44B1T7S/PU+mold+composite.jpg Show All - Structure: Initial Core Design Left: Final version of mold with tank inside. Center: Liquid PU poured into mold, sealed with cap. Right: Multiple iterations of PU chemical blends to achieve right amount of "cushion." https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519058877722-79OSL51HNARS3KDK887F/image-asset.jpeg Show All - Structure: Initial Core Design How science gets done :-) https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059000383-G9QEMK64N48DYYQUXZWG/IMG_0977.JPG Show All - Structure: Initial Core Design Jet arm outboard bracket (red anodized aluminum) https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059167932-TQ8THJ01JWGBWSUWVYQM/IMG_0980.JPG Show All - Structure: Initial Core Design https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519058834992-YOR4FT91T0RIYIACFSLR/IMG_0973.JPG Show All - Structure: Initial Core Design Internal structure with four decks https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059144885-2DY7DCUW7BWOOHTKWZOJ/IMG_0987.JPG Show All - Structure: Initial Core Design Thanks Fruity Chutes! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519059021353-3PXGA8PN7LGBUTCTXY57/IMG_0978.JPG Show All - Structure: Initial Core Design Jet arm inboard brackets with upper mounting ring (dark 3D-printed resin with through bolts) https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519058980139-W65EFN90WQC2XNBE81EF/IMG_0985.JPG Show All - Structure: Initial Core Design https://www.happresearch.com/blog/2018/2/19/autopilot-maneuver-demonstration monthly 0.5 2018-02-24 https://www.happresearch.com/blog/2018/2/19/altitude-chamber-redux monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057982296-HJHSBHQEIK1NJQ7X9ATH/IMG_0668.JPG Show All - Altitude Chamber: Redux https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057907225-PD0EE08LZKDBAUHNQFSP/IMG_0595.JPG Show All - Altitude Chamber: Redux https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057944552-R3JM0YIYWZD7N9C19Z7O/IMG_0704.JPG Show All - Altitude Chamber: Redux https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057926265-5UN41X85T0NA6PRP7RG2/IMG_0648.JPG Show All - Altitude Chamber: Redux https://www.happresearch.com/blog/2018/2/19/altitude-chamber-and-violent-implosions monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057640274-ISXF236XA7I14H2GMPVQ/composite+2.jpg Show All - Altitude Chamber: Violent Implosions From clockwise at top left: Imploded steel drum; Contents barfed out of the drum; Pressure fitting sheared off; Bits and pieces of the apparatus & nozzles. Glad those red LiPo cells didn't go nuclear! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057686375-7TSCMPOUR4VTYLQOBX04/image-asset.jpeg Show All - Altitude Chamber: Violent Implosions Would this man quit after a minor disaster? No! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057535038-QGDHEVDKLVBLAZ8LCC6A/composite+1.jpg Show All - Altitude Chamber: Violent Implosions Clockwise from top left: Router and protractor on plexiglass slab; Pouring RTV silicon into the trough; Peeling away protective masking; Attaching hangar for monofilament; New compact test apparatus; Steel drum; Apparatus hanging from plexiglass cover. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519057595411-7QQX0S2L0RO21YDPIZRD/IMG_0406.jpg Show All - Altitude Chamber: Violent Implosions   iPhone controller made using Arduino Manager https://www.happresearch.com/blog/2018/2/19/flight-hardware-kickoff monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519054868091-90GNDBBYHXAC2MHDQS35/thruster+v8+v18.png Show All - Flight Hardware Kickoff Updated design for jet nozzles (v8). Optimized for high altitude and lookin' like a BOSS. Being 3D printed right now. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519054902046-CJ9PXNSE0ZRMA96255CC/image-asset.jpeg Show All - Flight Hardware Kickoff First flight hardware arrives. Plenty o' techie goodness in those boxes! https://www.happresearch.com/blog/2018/2/19/first-jet-controlled-stabilization monthly 0.5 2018-02-24 https://www.happresearch.com/blog/2018/2/19/dynamic-test-fire-jet-force monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519054298403-R2RW749U9BG0VI1WUN7X/tripod+strings.JPG Show All - Dynamic Test Fire: Jet Force Ready to spin https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519054337953-47YGDUGQDMMSRFVR3HW5/force-pressure+graphs.jpg Show All - Dynamic Test Fire: Jet Force https://www.happresearch.com/blog/2018/2/19/who-are-my-readers monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519053762271-TWH9T5N1OB9CSON10IZM/2016-05+viewer+geography.jpg Show All - Who Are My Readers? https://www.happresearch.com/blog/2018/2/19/two-methods-to-measure-moi monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519053458072-LZE7PG3WU7MC1D9C08F4/rubber+band+on+nozzle.JPG Show All - Two Methods to Measure MOI The HAPP project utilizes only the most sophisticated technologies: Cardboard box, millimeter scale, and an old rubber band. Nozzle v6 points left and v3 points right. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519053429065-E2EJ6983CC5T1G206PVY/rubber+band+force.jpg Show All - Two Methods to Measure MOI https://www.happresearch.com/blog/2018/2/18/trifilar-pendulum-for-moi monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014801277-5IZPO1N5B9ARH8N50AQC/IMG_0168.JPG Show All - Trifilar Pendulum for MOI True rocket science https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519015014434-BQ9WJFNSMKSYWOHW46AT/unloaded+and+loaded.jpg Show All - Trifilar Pendulum for MOI Empty platform (left) and loaded with small weights (right) https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014728725-GADJ6DV3P4LS9GGXYPEM/Eq3.jpg Show All - Trifilar Pendulum for MOI https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014755894-878Q9JPEKXY76YA05HNZ/Eq2+Eulers.jpg Show All - Trifilar Pendulum for MOI https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014866733-PYRJ7TAWUAD5YMVW3BTT/IMG_0170b.jpg Show All - Trifilar Pendulum for MOI Suspension crimp https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014897164-U85SEJL94E9N2GE991TH/IMG_0173.JPG Show All - Trifilar Pendulum for MOI Nice and level: The pendulum platform https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014700928-NJOOI4U1A3AFNTCNPCAZ/Eq1.jpg Show All - Trifilar Pendulum for MOI https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014781812-13V0MD2LRWJV3XDW27MY/IMG_0172b.jpg Show All - Trifilar Pendulum for MOI https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014993072-QYCWE45EYSNS8HUWSK9W/Auto+ID+inflections+and+2+inertias.jpg Show All - Trifilar Pendulum for MOI https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014949011-LERYK7TPU6DCP6TZMMSL/FD.JPG Show All - Trifilar Pendulum for MOI IMU, data logger, web server, and WiFi, plus an audible buzzer and a status LED https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014834101-7QNCSPVPLJMQ9FFHSE4W/IMG_0177.JPG Show All - Trifilar Pendulum for MOI In-line digital scale, 1 of 3 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519015039602-F5PW3XRHSNCSI57ZCYCM/image-asset.jpeg Show All - Trifilar Pendulum for MOI https://www.happresearch.com/blog/2018/2/18/static-test-fire-results-and-limitations monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014158452-9VLKMBSNCH3D1677RBJQ/test+mass+composite+nv3.jpg Show All - Static Test Fire: Results and Limitations Test masses for calibration, nozzle v3. Additional test masses (nuts & bolts!) are placed in the basket. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014194730-PG0AQ5G5DO0O77Y8NQ7B/First+data+Nv3A+Festo+Force.jpg Show All - Static Test Fire: Results and Limitations https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014360217-RPES3OG50K2UMFARJLWY/Eq2+Eulers.jpg Show All - Static Test Fire: Results and Limitations https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014290948-YBQ5A5F5R6MXXNZI9DPY/Nv6A+data+calibrated.jpg Show All - Static Test Fire: Results and Limitations https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014255602-R2E14CIBOAGLA11V0UV1/test+mass+composite+nv6.jpg Show All - Static Test Fire: Results and Limitations Test masses for calibration, nozzle v6. Greatly improved stability & repeatability. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519014220385-IJ9T25DO3JDVH9M2DCAC/First+data+Nv3A+Festo+Pressure+%281%29.jpg Show All - Static Test Fire: Results and Limitations https://www.happresearch.com/blog/2018/2/18/using-an-arduino-for-data-collection monthly 0.5 2018-02-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519013733948-S5KHO7UTYE5AIKTVPOME/ADC+and+delay.jpg Show All - Using Arduino for Data Collection ADC performance with different read delays: Readings for 1 of 3 input pins https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519013765505-7K3T3XYJLR4TSLCUKYZI/image-asset.jpeg Show All - Using Arduino for Data Collection https://www.happresearch.com/blog/2018/2/18/static-test-fire-prep-instrumentation monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519013239126-ZNMWMKEI66EA0P1LHRXO/pressure+xduce+fire+test.jpg Show All - Static Test Fire: Instrumentation Pressure transducer mounted to manifold https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519013321744-1IE69GBRHS20I6DC7PZK/bench.jpg Show All - Static Test Fire: Instrumentation Completed static test fire rig https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519013273419-IN5QNOG27L196FXGBQ14/force+sens+fire+test+composite.jpg Show All - Static Test Fire: Instrumentation Force sensitive resistor pad with nozzles v3 (center) and v6 (right). Note how the design of v6 was optimized for the force pad. https://www.happresearch.com/blog/2018/2/17/inspiration monthly 0.5 2018-02-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518918501172-CK4BMP7LJK7YI0VJVACO/image-asset.jpeg Show All - Inspiration © 2016 Christopher Couch https://www.happresearch.com/blog/2018/2/17/valves-and-pneumatics monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518918806284-3C5856G4D2K83AY1LLO5/image-asset.jpeg Show All - Valves and Pneumatics The two Festo 2/2 valves at right (47g each) have the same functionality as the 5/3 monster at left (447g) and are blazing fast https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518918883512-E3QJ6IK2RE77KGTVDM7T/IMG_0123.JPG Show All - Valves and Pneumatics One tidy little manifold https://www.happresearch.com/blog/2018/2/17/nozzles-design-considerations-and-initial-versions monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518918115949-JE19U9OV8WRNU0ZV2ODD/thruster+v6+composite.jpg Show All - Nozzles: Theory and Design Test nozzle version 6 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518917858575-HGQW3M2WX8EK5SWY1T1M/F-1_rocket_engine.jpg Show All - Nozzles: Theory and Design Rocketdyne F-1 engine for the Saturn V. Beast mode! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518918077815-JNLEQQPD46DEEXWXMDD8/image-asset.jpeg Show All - Nozzles: Theory and Design Test nozzle version 3 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518918043708-EKVP06SAFU8USRMBK2FU/IMG_0095.JPG Show All - Nozzles: Theory and Design Oopsie https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518918015755-V5NERKKB80F0QLP9JZ3R/single_thruster_v1_composite.jpg Show All - Nozzles: Theory and Design Test nozzle version 1 https://www.happresearch.com/blog/2018/2/16/controls-implementation monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518834781664-U73MXZF5A05B3NVISEBR/9axis+checkout.jpg Show All - Controls: Implementation BNO055 native output of attitude in radians https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518834223470-8S9JPX4P42GUX604HZBW/IMG_0031.JPG Show All - Controls: Implementation Espresso maker and liquor cabinet are on the other side of that wall; two additional and critical success factors. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518833795157-ZWK7SJCN7MXX9G58907R/IMU+size+comparison+2.jpg Show All - Controls: Implementation Left: Old and busted. Right: New hotness. The 1960s Apollo IMU versus an Arduino Uno with 9 Axes Motion Shield. The Bosch BNO055 IMU device is one of the tiny black bits on the shield. It measures 0.2mm x 3.8mm x 1.1mm. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518834385449-6BPOJQF08A8RFIMJZ4RD/IMU_first_Data.jpg Show All - Controls: Implementation Nothing like the smell of good data in the morning https://www.happresearch.com/blog/2018/2/15/controls-simulation monthly 0.5 2018-03-12 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518746431244-0WAFRQFP8UJUMENJ8FUT/image-asset.jpeg Show All - Controls: Simulation HAPP Flight Controller Simulink Model Blue = Constants; Grey = Controller & Dynamics; Yellow = Output; Orange = AD/DA; Red = Unused (translational dynamics) https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518746087109-S6X2892KT6LGM5VR6DNJ/beach+ball.jpg Show All - Controls: Simulation https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518746214971-GDNBLTINODK1IRXAZVNO/jetCmd.jpg Show All - Controls: Simulation Implementation of phase-plane control law for one axis. Inputs: State variables (e, edot), Jets per spin direction (N=2), Allowable deadzone (DZ), Jet moment divided by inertia tensor (alph). Inspired by Gran (2007) Ch. 9 but different logic flow. https://www.happresearch.com/blog/2018/2/15/controls-strategy-and-control-law monthly 0.5 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518723139425-O9V7PUZ1OQZZJ2A4GJFB/6DOF+Simulink+layer+1.jpg Show All - Controls: General Strategy Top layer of the quaternion-based dynamics model. Maths R fun! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518723242121-5N1MEF3OXAYI6U593N16/phase+plane+sketch.jpg Show All - Controls: General Strategy Switching curve plots and formulas. X-axis = attitude; Y-axis = angular velocity; FZ = fire zone; CZ = coast zone; +Q = positive jets; -Q = negative jets. The quadrants I-IV represent conditions to check in the controls software. https://www.happresearch.com/blog/2018/2/15/first-post monthly 0.5 2018-02-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518720458760-V4K9AV2YCTI1ILW28WDL/TCStarTrails.jpg Show All - First post! © 2016 Christopher Couch https://www.happresearch.com/blog/tag/electronics monthly 0.5 https://www.happresearch.com/blog/tag/controls monthly 0.5 https://www.happresearch.com/blog/tag/stabilization monthly 0.5 https://www.happresearch.com/blog/tag/software monthly 0.5 https://www.happresearch.com/blog/tag/simulation monthly 0.5 https://www.happresearch.com/blog/tag/valves monthly 0.5 https://www.happresearch.com/blog/tag/autopilot monthly 0.5 https://www.happresearch.com/blog/tag/Great+American+Eclipse monthly 0.5 https://www.happresearch.com/blog/tag/thermodynamics monthly 0.5 https://www.happresearch.com/blog/tag/Simulink monthly 0.5 https://www.happresearch.com/blog/tag/blog monthly 0.5 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https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1400275370693-L0ZTMZY7L6SCYQG6GO85/xzuvhgdQGul0amA3Qc7a_373A9681.jpg News https://www.happresearch.com/news-bedford/2014/1/23/get-out-there-xg8fh monthly 0.5 2014-04-13 https://www.happresearch.com/news-bedford/2014/1/23/why-deserts-matter-too-6ebgr monthly 0.5 2014-04-03 https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390513173585-DWV4B9Z0B3GY1421D88O/tumblr_mjdttrQLOJ1rkz363o1_1280.jpg News - Why Deserts Matter Too https://www.happresearch.com/news-bedford/2014/1/23/appalachia-gspz2 monthly 0.5 2014-09-30 https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390512900953-CBP39T42JYJB4AT50XTE/tumblr_mjs7w6zIHV1rkz363o3_1280.jpg News - Success Story – New Hope in Old Appalachia https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390512900611-EF33OSHTK3F9FL7P3XQO/tumblr_mjs7w6zIHV1rkz363o5_1280.jpg News - Success Story – New Hope in Old Appalachia https://www.happresearch.com/balloon daily 0.75 2018-02-23 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518729513160-XOA1QH60X08FOOGQD8DA/image-asset.jpeg Balloon Secondary camera view of the cutdown pyro at the moment of firing. The main tether is already recoiling upward like a spring. The primary 360 camera is visible at top center. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519264296270-352GPHQC22X8CZAU484X/cutdown.png Balloon Cutdown guillotine in lab tests; hard to see it up in the air! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519217749854-5JF60OWJRYM7J5MW1DTO/bridle.JPG Balloon Bridle attached to balloon neck https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519364991915-GCAI95R5WKSGHSFEXAYC/virb+and+mount.jpg Balloon FEA simulation of balloon tether mount under high stress (left); Mount in assembled position after cutdown pyros were fired (right) https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520088297332-O3Q8UKO5FFHMZHOCH92Q/Black.png Balloon https://www.happresearch.com/acknowledgement daily 0.75 2018-02-23 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518724750587-8LUEYIFFY7IBSM80XPFE/thingsmiths.png Acknowledgement - ThingSmiths 3D printing service in Ann Arbor, Michigan https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518651603204-TXI5G66ZNR4R6OWI7DP6/menlo.png Acknowledgement - Menlo Innovations Bespoke software developers in Ann Arbor, Michigan https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518653147653-1N7U1RSL9U2Z1TKM9WE4/pioneercuts.png Acknowledgement - Pioneer Cuts CNC machining services in Saline, Michigan https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518651631431-ECEU8QARXHBU8AQTUF1P/Arduino+logo.png Acknowledgement - Arduino Open-source community https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518652580473-T94TQ5ORV9GH9QZDTIDO/adafruit+sq.png Acknowledgement - Adafruit Open-source hardware company https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518724858950-BDZ251XIPCB40QTS3MNN/Fruity+2+MAIN.png Acknowledgement - Fruity Chutes Bespoke parachute manufacturer for hobby rocketry and drones https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519366068183-78M291LDLCJVLTII85BB/ptr.jpg Acknowledgement - Prairie Twister Rocketry Providers of cable cutter pyrotechnic devices https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518652785167-FE54XYF4EQF4XKFBFPMI/garmin_logo.png Acknowledgement - Garmin Makers of the VIRB 360, the primary imaging camera used on the HAPP https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518724945555-DUM8M8A4VNP3MOMD5YDW/gopro.png Acknowledgement - GoPro Makers of the Hero 5 Session, the secondary (non-360) cameras used on the HAPP https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518652100385-D2CFNVITC7VHLP4HRR7A/Fibreglast.png Acknowledgement - FibreGlast Raw materials and tools for carbon fiber production https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518725025385-9HG1DP7X3KA57DVBMQ3G/Rockwest.png Acknowledgement - Rockwest Composites Raw materials and tools for carbon fiber production https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518725074089-6WJB9X7MTLQR3TK2GLZV/ublox.png Acknowledgement - uBlox Makers of the MAX-M8Q, the GPS module used on the HAPP https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518725123645-L6ZXYF31W5UY6RX6S443/rockseven.png Acknowledgement - Rock Seven Makers of the RockBLOCK 9603, the Iridium satellite device used on the HAPP, and providers of data service https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518725198613-UX20AS16P3DY910K04Y3/Protolabs-logo-tagline.png Acknowledgement - Protolabs Rapid prototyping service including 3D printing and CNC machining https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518725239116-TY3MR660RH7ET28UQM16/HighAltScience.png Acknowledgement - High Altitude Science Suppliers of high altitude weather balloon and associated equipment https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518709324138-0RNC6IJHOZUSE6Q4K6YL/alaska.jpg Acknowledgement https://www.happresearch.com/missions daily 0.75 2018-07-08 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518712327948-BATPWL0VXU8EIVDHHNFY/IMG_4180.JPG Missions https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520026617758-FFB6KEMI9HHYV9BXXH0H/Black.png Missions https://www.happresearch.com/home daily 1.0 2018-03-23 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518664827040-AKA434J84K0UOAN58ICV/cams.png HAPP Research https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518661441752-VXHBXZYAVODKS7TJZDJZ/Assembly_2018-Feb-10_11-44-26PM-000_CustomizedView2370444816.png HAPP Research https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1521733804429-MXZDY0BQ0R34J0C4XVWA/IMG_5050.jpg HAPP Research https://www.happresearch.com/team daily 0.75 2018-02-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518667503969-SABVMW3RHYF7X4MOVBZU/We+Need+To+Cook.jpg Team We need to cook... carbon fiber. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518724326075-JHJGXINCQ9IOCBUDLI58/IMG_2818.JPG Team https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518709301415-UF78CSO39C7969F3JCVC/alaska.jpg Team https://www.happresearch.com/structure daily 0.75 2019-02-07 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519168312511-5YWFFCC1TAO2PPZ22F21/image-asset.png Structure Core structure extracted from aeroshell post-flight. The main strut, strakes, and decks are clearly visible. From bottom: Propulsion, Electronics, and ELS Decks. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1549514331966-FYYGL9A2K3FWURPZJGHA/shells%2Band%2Bchris.png Structure HAPP core structure with two sets of aeroshells. Development of the molds and fabrication process took several months. Copies of the parts can be produced from the molds in a few hours. That look on Chris's face is a mix of elation and exhaustion. Elaustion? https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519182228421-UH1PKNTA9B0U50D1XGJA/preflight+assy.png Structure Core and aeroshell fully assembled and ready to fly https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518727106956-CO80UD9FY40WYSHAUFB1/UpperShellLayup.JPG Structure Laying up carbon and Kevlar fiber material for the HAPP's upper aeroshell on an orange mold https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527047893688-ZQR3RXN3MJDYPCYY5VK0/Untitled-1.jpg Structure Confirming aerodynamic performance of the structure with CFD simulation https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520088273521-546AB2UGU7MZQ80HX9BQ/Black.png Structure https://www.happresearch.com/rcs daily 0.75 2018-02-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519258815206-PP2XAMKL2J02DRE4CM13/nozzle+iterations.jpg RCS Final design for Z-axis nozzle packs along with several failed iterations. This is what innovation looks like... https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518727734844-7OJ3T3V9HD3XSCOYE6CO/RCS.png RCS Rendering of main components for the RCS. They are packaged tightly inside the HAPP and are not easily visible after assembly. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520088280535-F0FF2TKE4NFNKL9VSZZH/Black.png RCS https://www.happresearch.com/overview daily 0.75 2018-05-25 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518696626323-V6WRFUS00AXZEFON4A2Z/thruster+4-pack+rendering.png Overview https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518696416231-D3PK7RS0J681R9T2YEKO/ring+tether+FEA+8+v7.png Overview https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518880209283-PYTLA579LPVFXR58WZUG/code.png Overview https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518695773221-LBDEDA63NCLXPXM1ELZM/AP.jpg Overview https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518696218155-I33HJQWXP588BKN0WY5A/IMG_2640.JPG Overview https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518880132077-JVSNLH4XCDJR2NRPUWNS/25439951_1169167013214771_66719678498486946_o.jpg Overview https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518695889509-NCGJ3GHYTZ2DRSZF0EK9/zzz+IMG_1415.JPG Overview https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518730655844-QIICCOU5WW5JNC6ZZ1WK/ElectronicsCAD+-+Crop.jpg Overview https://www.happresearch.com/action daily 0.75 2018-05-11 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518823655792-YXK1YBXKEVLVYGZMFWNZ/1GREY.jpg How To Help https://www.happresearch.com/story daily 0.75 2018-03-03 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518704638570-LSX3W9EYUQF1HPANY4IH/DBFH.jpg Our story Apollo on the left, HAPP on the right. NASA worked out the aerodynamics and we're not ashamed to plagiarize! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518709049738-ARYLZ755OGSIFK5E6C5Q/alaska.jpg Our story https://www.happresearch.com/electronics daily 0.75 2018-03-03 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519319925180-6CJVO0N3KN3L895DK8IF/VIRB.jpg Electronics Garmin VIRB 360 mounted inside the balloon tether ring https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518794875068-54LRRU3OFY438OCZ3ETV/22047380_10155005889718946_1364317343_o.jpg Electronics Making the magic happen https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519319763915-7CIFVYFSCHCIP2UFYZYT/2000px-Arduino_Logo.svg.png Electronics https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520088264009-3MT4NPHLBQNPZ5YMVXAW/Black.png Electronics https://www.happresearch.com/contact daily 0.75 2018-02-15 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518709344103-QZU0HYLCWM4IS9X5UZ6D/alaska.jpg Contact https://www.happresearch.com/software daily 0.75 2019-02-07 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519259866864-3NS0X9RZ3UTD68KU17V1/menlo.png Software & App https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519262128074-IOHVZVG4D1VIDI5A3XNH/rockseven.png Software & App https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518795437160-3006OMDUYAX71XYWUOT2/13313538_10153672743468946_820129682_o.jpg Software & App Wait, what programming software is that? https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519258986127-S2BYOHJOC5ZXIBDT6UUT/Arduino+logo.png Software & App The flight computers are proudly powered by Arduino https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520088304633-LA92XFGISRD32U46LI7M/Black.png Software & App https://www.happresearch.com/els daily 0.75 2018-02-23 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519267079353-C865U3FBE1RL15AI8JL8/chute+arm+FEA+and+render.png ELS Parachute tether assembly. FEA analysis of chute opening shock (left), assembly installed in the main strut (right). https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519216588034-UKWQSUSYNW6GQX3XPFNA/IMG_2921.JPG ELS Chutes away! https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518728997941-C2SMY1VQVGDPTDEGEV3R/image-asset.jpeg ELS Parachutes packed into carbon fiber mortars https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520088289534-D2U4ZSVPECK5X0AIM35D/Black.png ELS https://www.happresearch.com/social daily 0.75 2018-02-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518829547188-VTLJ6OW09VE8JTS9OZ98/ig-logo-email.png Social https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518829528507-8KM1S9KCRT8A8E4KEZ5Q/twitter-logo-png-transparent-background-twitter-transparent-logo-png-1024x1024.png Social https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519495494443-NBJFBZ0BQI4O4NX3UAT3/YT.png Social https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519495432966-E05SH799E0NQKVPLKJS8/FB.png Social https://www.happresearch.com/operations daily 0.75 2018-05-11 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518794688116-2HOU8EBD92U7AGCLGOQ3/18426486_10154481531032927_87238251_o.jpg Operations Flight path simulation imported into Google Earth. This is approximately the view from the HAPP at apogee. https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520088311901-UR2ZEPUUZP01WTVSCSB2/Black.png Operations https://www.happresearch.com/join daily 0.75 2018-02-20 https://www.happresearch.com/custom-404 daily 0.75 2018-02-19 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519016198318-I19BT8N70AMUYC3OHDVL/22851922_1139489806182492_4300828395651882034_n.jpg Custom 404 https://www.happresearch.com/browse daily 0.75 2018-05-25 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519328674129-DLJ92D5BTGQJPOUJRSEJ/Presentation1.png Blog https://www.happresearch.com/app-privacy-policy daily 0.75 2018-05-11 https://www.happresearch.com/missioncontrol daily 0.75 2018-05-25 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527203559426-Y74K1QUXRJDO2V8W3BFC/google-play-download-android-app.png Tracking App https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527203570723-AU8ONO9XRBX8PDTWXJ3F/google+play+SCALED.png Tracking App https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1527207891636-KVQUEZ0UKPAEOHNDX5GS/Black.png Tracking App https://www.happresearch.com/home-alt-bedford daily 0.75 2025-05-09 https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500612440-PGQSIY8KL9F7T5VIXQLO/chambers-2.jpg Home Alt A better world Starts with a choice Contact Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500503574-5BAPXZO9U06UV61P49UO/chambers1.jpg Home Alt Sustainability Starts with you Join Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500933384-LII4SRIPHFYOUFX0UCXC/chambers-4.jpg Home Alt A better world Starts with a choice Join Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390504287124-HQ8GNX1JCE22V047MSQ9/chambers-8.jpg Home Alt Preserve Nature Join Us https://www.happresearch.com/read-me-bedford daily 0.75 2025-05-09 https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390928870858-4D9B6T9WGP8017NSS9W3/topography.jpg Read Me https://www.happresearch.com/store daily 0.75 2018-03-21 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519494605390-W9BORX9RYW3893423CGJ/Black.png Store https://www.happresearch.com/store/happ-blueprint-poster monthly 0.5 2018-07-08 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1521918880015-U4CMSTPQWL2FMVVZXLLS/poster+blueprint+store+ad.png Store - HAPP Blueprint Poster https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1521680420563-MOVOYKJTC7ALMQDOFORP/poster+blueprint+2.5K.png Store - HAPP Blueprint Poster https://www.happresearch.com/store/happ-systems-poster monthly 0.5 2018-03-24 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1521919032855-V47BFG3FYAV41YN7MFHB/Poster+sys+overview+store.png Store - HAPP Systems Poster https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1521772799500-3YYIL16J145UQIIAE7V9/Poster+sys+overview+2.5K.png Store - HAPP Systems Poster https://www.happresearch.com/store/ground-crew-polo monthly 0.5 2018-07-08 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520026268793-CBC9QKIOKE4VMD8P4HVL/Shirt+1b.png Store - HAPP Ground Crew Polo https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520023721159-RK1ZN3KU12WI2MT5XLM7/Shirt+2.png Store - HAPP Ground Crew Polo https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520023684873-EVLGXBKOJL0L0FBBTC0S/Shirt+3.png Store - HAPP Ground Crew Polo https://www.happresearch.com/store/donate-satellite-service-for-one-mission monthly 0.5 2018-02-23 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519136462089-A6JR4RG3N1K6XCWFZE3H/FC.png Store - Donate Satellite Service https://www.happresearch.com/store/happ-mission-patch monthly 0.5 2018-03-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519009616759-3JNUPTJJBTBQ5GP3F60P/Patch.png Store - HAPP 3" Mission Patch https://www.happresearch.com/store/donate-a-tank-of-helium monthly 0.5 2018-02-19 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519015946424-4XF35MB9LFIOULU94HJP/tanks.png Store - Donate a Tank of Helium https://www.happresearch.com/store/donate-a-balloon monthly 0.5 2018-02-19 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519016033187-YE2SGFAXO9D40NOXK7IM/1.png Store - Donate a Balloon https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518921509595-W01U3V4L8EVHS18DWIQ1/2.jpg Store - Donate a Balloon https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518921040431-AJHCJP8NB33QWP3WDUSO/25439951_1169167013214771_66719678498486946_o.jpg Store - Donate a Balloon https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518921045892-U8F13MZIQ0NZTLHWZ2WA/25588180_1169167046548101_7067525476059049996_o.jpg Store - Donate a Balloon https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1518921317216-DHTYHXYZI5RUR2SR7OC6/1.jpg Store - Donate a Balloon https://www.happresearch.com/store/donate-10 monthly 0.5 2018-02-20 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1519137673759-53KM4YOG9BNV4NSF2CPM/Donation.png Store - Donate $20 https://www.happresearch.com/store/happ-research-logo-text-sticker monthly 0.5 2018-03-22 https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520022344395-BPFF7CVUQ59GFPRJTB8H/HAPP+sticker.png Store - HAPP Logo 4" Sticker https://images.squarespace-cdn.com/content/v1/5a845b46fe54efed21188902/1520022336057-O7877AGMPWQWH1MKW856/HAPP+sticker+2.png Store - HAPP Logo 4" Sticker