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Date: Tue, 05 Jul 2011 13:51:07 -0400
From: Ernest Christley <echristley@att.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: generator and dyno prop
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Charlie England wrote:
> On 07/04/2011 10:51 PM, Ernest Christley wrote:
>> I tested the dyno-prop today.  I had been waiting to complete some 
>> rework on the Harly-Davidson generator I'm using.  I was trying to 
>> pass control back to the pilot by putting a solid-state relay inline 
>> with the regulator's output.  The relay appears to have either 
>> interfered with the proper operation of the regulator, or caused 
>> enough of a voltage drop to make the generator unable to charge the 
>> battery.  Either way, the relay is out, and a 80A fusible link is in.  
>> I'm now getting 13.5V at 4000rpm.
>>
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   
>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>
> Hi Earnest,
> 
> 13.5 V sounds a bit low, unless the regulator is holding voltage 
> artificially low. Isn't the HD generator designed for direct drive off 
> the HD crank? If so, I'd think that it could make useful voltage & 
> current at much lower rpm (think city riding in traffic).
> 

I had some starting issues, so the battery was run down a bit.  The voltage was still climbing when I had to shut it 
down due to the heat.  The regulator should bring it up to 14.25V eventually.