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Old Nov 04, 2004, 07:10 AM
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in persuit of low wing loading
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Boston, Mass
Joined May 2001
6,463 Posts
Zlatko,
The Super Slicks motors are much lower resistance than the 7mm pager that Coural developed his two stage gearbox for. So, unless you are going to drive a really huge prop, for these hotter wind 7mm motors the gear ratio is probably too high. I guess I was referring to single stage gear boxes in appropriate gear ratios for these. Didel does have 5:1, 6.7:1, and 9:1 single stage gear boxes for the 7mm motors, and several 2-stage gear ratios as well.

It will be interesting what your results say in terms of brass versus ball bearings. When I've tested the same pager motors in gearboxes using the same gears but different bearings (ball, brass, nylon) I got virtually the same static thrust. But, it could change with a more powerful motor on more cells.

Gordon
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Last edited by Gordon Johnson; Nov 04, 2004 at 07:19 AM.
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