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Sunday, June 29, 2008

Wirefly X-Prize Cup 2007
Armadillo Aerospace competed in the 2007 Lunar Lander Challenge event.

. Competition
In the level 1 events, Armadillo's craft MOD (actually, module #1) logged several attempts, including several successful first leg flights, but was unable to complete the return trip during any attempt.

On its first attempt, a clogged igniter orifice prevented ignition. On the second attempt, the first leg flight was perfect; increased guidance and control capabilities allowed the module to, in Carmack's words, 'burn the X-mark off the target pad'. The return leg was delayed slightly, because the igniter had clogged again. When the second leg was attempted, a 'hard start' cracked the graphite combustion chamber. As the vehicle was still flying, Carmack flew the crippled vehicle through the course as quickly as possible and hovered 2-3 meters above the landing pad. With only a few seconds remaining in the required flight time, the damaged combustion chamber cracked again, which caused the vehicle to tilt enough to trigger a computer abort. the vehicle performed an auto-land, but the tilt caused the module to tip over on landing after only 82 seconds in the air.

The second attempt began with another perfect first leg, but the return was marred by another hard start. Seeing that the engine was badly damaged (although flying), the team commanded an abort. The module landed back on the pad after only a few seconds.
On the final attempt, MOD suffered a violent "hard start", resulting in engine explosion. The violence of the explosion embedded a piece of the graphite chamber in the ground 64 meters from the launch pad, and ended the attempts for this year's prize.

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