03-25-2021, 11:59 AM
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Retired with Way Too Many Kits
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Join Date: Jun 2007
Location: Colorado
Posts: 3,222
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Quote:
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Originally Posted by barone
Looks good! I had to do a lot of funky math to get the length for the upper stage BT (plans included nose cone and fins in the length) Came out to 6 13/16 inches for the BT. Thinking of just rounding to 7". What length did you settle on?
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Don, Here is a list of the old tube designations. The 20D is 6.5”, the 20G is 3.5”. I scaled mine up from those lengths to get lengths for BT50 tubes for mine.
That said, the upper tube seems a little short by today’s standards. I think 7” is fine, unless you obsess about this stuff, like I usually do. 
http://www.ninfinger.org/rockets/body_tubes.html
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Lee Reep
NAR 55948
Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp
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