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Rocket launch in Lincolnshire, 1999
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R-DAS FLIGHT #9 DETAILS
 

Flight #: 9
Date: 31st of March, 2002
Venue: Pete's Rockets, Heckington, Lincolnshire
R-DAS Type: R-DAS Compact
R-DAS firmware: 3.2
R-DAS Recorded Altitude: 1392 feet (422 metres)
Apogee - Charge Firing Delta-t: 0.8 seconds
Apogee - Charge Firing Delta-h: 0 feet (0 metres)
Descent Rate at Apogee Deployment: 0 feet per second (0 metres per second)
R-DAS Flight Mode: Apogee & Main Ejection (breakwire launch detection & smart recovery)
Total Time of Flight: 40.5 seconds
Apogee - Charge Firing h Variance: 0%
Launch Vehicle Diameter: 4 inches
Launch Vehicle Length: 7 feet
Launch Vehicle Propulsion: Hypertek J-250 Hybrid
440/54-125-J (0.125 injector orifice)
Fins: 4 clipped swept deltas (Aerofoiled)
Launch System: Rail Launch
Finish: Unfinished
Ejection Method: Electronic Deployment using apogee charge in SafeEject canister, then main charge in SafeEject canister
Ejection Ignition Type: Daveyfire igniters (electric matches)
Launch Vehicle Mass: 3.5 kg (vehicle with hybrid motor but no oxidiser loaded)
Total Propellant Mass: 405 grams
Total Loaded Motor Mass: 1294 grams
Total Impulse: 737 Newton seconds
Comments

The third flight of this rocket, launched again on the Hypertek J-250 hybrid rocket motor (using a 440cc oxidiser tank). Launched in moderate winds, the rocket fishtailed on the ascent, although the trajectory was reasonably straight. Two stage recovery was used, with a Rocketman R24D Ballistic Drogue deployed at apogee, and a Rocketman R7C ProXP Parachute deployed from a Rocketman deployment bag at 500 feet altitude.

The R-DAS used breakwire launch triggering with smart recovery. This option was again chosen because the oscillation in Hypertek motor combustion has been known to result in irregular launch triggering of the R-DAS. The breakwire and smart recovery option worked perfectly, and both ejection channels fired on cue. The descent and landing was gentle.

Thrust Section of Flight

Fri, Dec 15, 2017, 13:56 GMT (9) 6:55 16:35 91 %
 
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 Richard Osborne - 1995-2006