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Date: Tue, 22 Feb 2005 14:09:03 -0500
From: Ernest Christley <echristl@cisco.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: 2nd Alternator stuff... revisited..
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John Slade wrote:

> I think someone else already mentioned this, but if our assumption is 
> that you'll lose the belt, then your battery will far outlast your 
> coolant and engine due to the loss of the mechanical water pump.   
> True, but this not a problem is you have an EWP, right?
> I, for one, would love to see a simple back alternator option for the 
> rotary.
> Keep at it, guys.
> John
>  
>  

I found websites and several books that described how to build 
generators.  Unfortunately, none of them could provide information on 
the size of magnets, number of magnets, number of coils, or wraps per 
coil to get a given output (for us 14.2V and 35A at 6000RPM).  That was 
the reason I was looking for a permanent magnet DC motor.  A DC motor is 
just a DC generator in reverse 8*).  If I could find a 500W DC motor 
rated at 6000RPM I'd be set.

I think it would be a relatively simple task with this information.  
Well, simple compared to a plans built airplane.