09-24-2012, 02:04 PM
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BARCLONE Rocketry
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
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Bill,
As far as actual testing of any design, I'm relying here on the RS prediction results. Some designs produce very low Dv numbers, but the actual results will depend on the final construction of any given model. Some builders (like me) are a bit heavy-handed with finishing, so YMMV with every model...
When I say "random-length tubes", I mean I have used a single tube in the design phase that is the full length of what I need, rather than piecing the tube together from smaller lengths. I added the couplers later for mass balance. Most designs use standard tube lengths from the start. It works either way.
For me, I usually build with SEMROC stock lengths for convienience...
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