04-16-2012, 07:53 PM
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Bona-Fide Space Hero
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Join Date: Apr 2009
Location: ATL
Posts: 718
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Ah... I left something out.
I build my cones from 110 lb card stock, and add several "Longerons" lengthwise aft of the bulkhead.
I fly simple cones based on my glider cones sometimes. I have had one collapse due to wind-force and Krushnik effect. Once I added the longerons, I had no more troubles - even when launching on "D" motors.
The longerons themselves are strips of 110lb card stock folded to look like this when seen from the end "_/\_". They add rigidity and move the CG aft (a TWO-FER!).
__________________
John Adams
"There is a lot of rocketry under 20ns"
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