Does anyone make a 38mm to BT-70 centering ring?

J Blatz

Well-Known Member
Joined
May 8, 2010
Messages
1,077
Reaction score
81
I am looking to build a souped up USR Piston Stager with an H45 in the booster and some kind of long skinny 24mm up top (maybe an old AT G or the Ellis F20). Problem is that the booster comes with 29mm mount.

Do you guys know where I could get centering rings to center a 38mm tube in the BT-70 airframe?
 

qquake2k

Captain Low-N-Slow
Joined
Jan 26, 2010
Messages
13,574
Reaction score
45
Balsa Machining has a lite ply centering ring listed that is 2.175 OD x 1.637 ID, BT70 to BT60. But 38mm motor tube is 1.635 OD, so this ring would probably be too loose. You could contact them and see if they can custom make them for you. I have made similar sized plywood rings with hole saws, my woodlathe, and a Dremel.
 
Top