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Old 06-07-2019, 11:54 PM
Jack Hydrazine Jack Hydrazine is offline
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Join Date: May 2011
Posts: 246
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The ST-125 was the airframe tubing that had an O.D. of 1.34" and an I.D. of 1.25" with a wall thickness of 0.045"?

The BT-11 was the 29mm motor mount tube? The O.D. was large enough to slip into the 1.25" airframe I.D.?
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