Mailing List flyrotary@lancaironline.net Message #17700
From: Ernest Christley <echristl@cisco.com>
Subject: Re: [FlyRotary] Re: 2nd battery Re: Amps required to run engine&amp- hours available
Date: Tue, 22 Feb 2005 16:34:10 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Bobby J. Hughes wrote:

Found the picture. The catalog seems to be missing.
http://www.racemate.com/home.htm


 

There that's better.  The claim that it won't overvoltage is absolutely false.  In the bottom of the picture on the right.  That is the regulator.  It works by dumping excess energy to ground.  It looks like a heat sink, because it IS a heat sink.  If that thing burns out and you rev high enough that the rest of your system can burn off what the generator puts out, you're in an overvoltage situation.

The specs claim 1/3rd Hp to drive it.  That is about 18A at 13.5V.  I'll make a big assumption here and assume that they rated that at 5500RPM, the same number they used to compare the pump flows at the bottom of the spec page.  Using this on the end of the crankshaft would be a simple matter of bolting the coil pack to the front housing and the bolting the 'can' that carries the magnets to the end of the shaft.  Many motorcycles use this exact same setup, and you can buy some of those packages for about $100.  I looked at and rejected those, because 18A isn't enough for a replacement; though it will do as a backup.

Harley Davidson makes a similar setup for their Goldwing bikes that is 35A.  That is the one I want to look at.
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