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Old Jan 06, 2002, 09:39 AM
Gordon Johnson is offline
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in persuit of low wing loading
Gordon Johnson's Avatar
Boston, Mass
Joined May 2001
6,463 Posts
Mark,
I agree that our best shot of making this work is with efficient coreless motors which happen to like more volts. It could also be that we are trying to achieve the alchemist equivalent of turning lead into gold.

I have a Cloud 9 pager motor (about 1.7g after outer casing is removed) rigged up with 4.2:1 gearing, but have done only limited static tests. Also, I don't know who the manufacturer is. Mike posted a subset of his pager motor static tests, which were similar to what I got. Right now I have a Punkin bipe to finish, so probably won't get to the pager motor tests for a bit.

With a GWS 4.5x4.0 prop at this gearing I got
3.5v, 0.31amps, 5.25g thrust
4.0v, 0.32amps, 6.43g thrust
4.5v, 0.35amps, 7.45g thrust

With a GWS 5.0x3.0 prop at this gearing I got
4.0v, 0.31amps, 7.10g thrust
4.5v, 0.34amps, 8.46g thrust

These are pretty preliminary with just the gearing I had on hand, and props available. But, it's a start.
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Last edited by Gordon Johnson; Jan 06, 2002 at 09:43 AM.
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