Mailing List flyrotary@lancaironline.net Message #17701
From: Bobby J. Hughes <bhughes@qnsi.net>
Subject: RE: [FlyRotary] Re: 2nd battery Re: Amps required to run engine&amp- hours available
Date: Tue, 22 Feb 2005 15:46:36 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Ernest,

What is the other box upstream of the large heat sink? I assumed it was
a controller / regulator. Looks like it goes in the dash / panel. Also
they make several current ranges. (Can't find them on the new site) But
I know I read about a 22A and 32A unit in the past. Not sure if it is
possible on the shaft but John did say they where stackable on the water
pump unit. Would that require two belts?



Bobby -----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Ernest Christley
Sent: Tuesday, February 22, 2005 3:34 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 2nd battery Re: Amps required to run
engine&amp- hours available

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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