12-21-2017, 10:01 AM
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Master Modeler
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Join Date: Mar 2005
Location: Hillsboro, OR
Posts: 2,847
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I remember being mystified by references to the BT-40 in Estes literature I read in the early 70s. How could a whole body tube GO AWAY?
Later read all about it in scanned catalogs. The BT-40 was convolute-wound, like the BT-30. There was another, shorter plastic cone available for it, as well as balsa cones, bulkheads, and payload sections.
VERY early catalogs referred to BT-1, BT-2, and BT-3. I don't recall the mapping.
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NAR #27085 - Oregon Rocketry - SAM
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