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Bending longeron
Lou wrote:
On Mar 5, 2:29 pm, Jerry Wass wrote: J.Kahn wrote: I need to make bends of about 30 degrees in a 3/4 x .049 longeron tube, with a tight bend radius, no more than 3 inches. Can I do the bend hot without wrinkling the tube by free bending or do I need a supporting die of some kind? Anybody have any specific techniques? John --I bent some of the same tube by filling it with sand, bending it around a 10" pulley that had been turned out inside to 3/8" radius--Pulling it around with the inner race of a big ball brg that had used 3/4" balls--this was pressed onto a smaller brg which was bolted to a bar that pivoted on the center support of the pulley. BUT-- that's a 5" radius & you want 3"---might do it though..send ya a pic if your interested. wass biplane at tds dot net Can't you use a conduit bender? Lou Apparently you can but the radius I need is smaller than a conduit bender. |
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