Mailing List flyrotary@lancaironline.net Message #17735
From: Bill Dube <bdube@al.noaa.gov>
Subject: Re: [FlyRotary] Re: 2nd battery Re: Amps required to run engine&amp- hours available
Date: Tue, 22 Feb 2005 17:54:04 -0700
To: Rotary motors in aircraft <flyrotary@lancaironline.net>


The hard part is how much current do you get for what voltage at what RPM?  When I asked this question of several people, I was given a choice:

1) Guess. Test. Repeat.
2) Buy a product that is rated for your requirements.

        I think it would be best to start with a motorcycle stator that put out the right current and was the right size to fit over the crank and inside a modified crankshaft pulley. From that point, you would build a prototype PM rotor (crankshaft pulley) and simply play with the air gap to get the right output voltage. You don't have to change the gap much to get a big difference in voltage. You might have to swap the magnets for more or less powerful ones if the output voltage is WAY off.

         
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