03-22-2009, 10:07 PM
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Forest Sprite
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Join Date: Dec 2006
Location: Back Up in the Woods
Posts: 3,657
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As Steve said, what compelling designs have been made with HBT-1090? OK, there's the Delta Clipper, and ...?
True, the difference between HBT-1090 and ST-10 is 5 hundredths of an inch, which, when you divide by 2, is barely visible at all in the tube wall. OTOH, Semroc does sell BT-51 AND BT-52.
MarkII
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Mark S. Kulka NAR #86134 L1,_ASTRE #471_Adirondack Mountains, NY
Opinions Unfettered by Logic • Advice Unsullied by Erudition • Rocketry Without Pity
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