When it first came out we did a fast calculation on the mass difference between air and He and it was like an ounce or two for that volume (actual numbers are in the r.m.r archives...).


I flew one on an Aerotech E15-4 and it did start to flex aerodynamically. D12 is best.

The only reason it would get burn holes at ignition, is if you did not read the instructions and support it well above the flat blast deflector. My only burn holes are from post ejection minute embers that managed to impact the bag.

The name comes from the Big Lebowski.

http://www.imdb.com/title/tt0118715/

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-Fred Shecter NAR 20117 (L2)
Southern California Rocket Association, NAR Section 430