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Old 12-18-2006, 07:20 PM
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CPMcGraw CPMcGraw is offline
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
Exclamation New Plan -- Kitfox

This one takes me back to the origin of this thread, which was a "scrounged-up" design based on parts that I had left over from other projects. I was looking in my parts box this morning and came upon a nose cone and a 10" length of ST-8 from what I figure was meant to be another Aerobee 150, but which I never started on. I also wanted another Schoolyard Sounder design, so finding some CR-58 rings and a length of ST-5 took care of an engine mount. Having just completed the fins for a replacement Tradewind, I chose to recycle the main fin shape and use two of them with a ring-fin from a length of BT-55. RockSim says the design is stable with a 2.15 margin using the A10-3T.

Length: 15.30"
Diameter: 0.908" (ST-8)
Fin Span: 4.91"
Weight: 0.88 oz

1/2A3-2T......115'......Dv 8 FPS
A10-3T........240'......Dv 12 FPS

Both motors reach flight velocity on a standard rod.

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Craig McGraw

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