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Old 02-04-2017, 07:03 PM
al_packer al_packer is offline
Old Fogey
Join Date: Sep 2005
Posts: 57

Originally Posted by Woody's Workshop
So the very first Alpha used a BT-50 9" long?
The only one's I've seen (or built) were BT-20.
I'll have to scratch build one soon of a BT-50 version.
Do you have a part number or a BNC number?

BT-50 was 0.950 I.D., 0.976" O.D., at least up until I departed in 1977. That just happened to be the size of a stock mandrel that Euclid Spiral Paper Tube Company had. The nose cone was a BNC-50K.
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