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Building Tips and technical articles. => Building techniques => Topic started by: Tim Wescott on June 17, 2010, 02:26:24 PM
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This probably isn't the best from a work/results standpoint, but it was interesting to make.
Belcrank mount. Instead of a hunk of threaded rod to go between two plywood plates, it's a fitted aluminum pivot to go the same place. O/A weight including fasteners is 1/4 oz.
And then I'm going to take this piece, which is probably overkill for top-level competition, and put it into a cruddy 25-sized profile sport/trainer.
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Must be nice to have a lathe. Have you checked the Tom Morris way of mounting bellcranks in built up wings? H^^
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Is the "Tom Morris" method the one that uses the threaded rod with nuts and a bushing?
That's kind of what I'm doing here, only with the aluminum axle instead of the steel all-thread rod. It should be stiffer, and offer a larger bearing area on the plywood mounts top & bottom.
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The last one I used was steel rod with what I call eyelets top and bottom of bellcrank using J-B Weld. Sofar no problems with it. Of course I put plywood pads on the top and bottom seeting of the wing. H^^