11-05-2008, 03:31 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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Quote:
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Originally Posted by JAL3
I was looking through my collection of old DOM plans and found one called the 2 stage PeeWee. When I took a closer look, it listed a BT-3 for the body. The data I found ofr that tube from Fliskits and from Semroc give an ID of 0.349. A BT-5 (13mm motor) has an ID of 0.515.
Question: are these the same BT-3 tubes mentioned in the Estes DOM plan?
If so, what did they fly on since a 13mm would not fit?
Thanks,
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No, not the same at all. Take a look at the 1962 Estes catalog, pages 3 & 4. In 1963 or 64 the designations were changed.
BT-1 = 13 3/4" long, ID = 0.765", OD = 0.825" (wall thickness 0.030")
BT-3 = 9 1/4" long, ID = 0.725", OD = 0.765" (wall thickness 0.020")
Estes did not have 13mm motors at this time.
(BTW -- Love the tagline...  ) |