Mailing List flyrotary@lancaironline.net Message #17776
From: Richard Sohn <unicorn@gdsys.net>
Subject: Re: [FlyRotary] Re: Motorcycle generators
Date: Wed, 23 Feb 2005 10:19:08 -0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
 
----- Original Message -----
Sent: Wednesday, February 23, 2005 7:29 AM
Subject: [FlyRotary] Re: Motorcycle generators

I propose that the stator be bolted securely to the backside of the
PSRU, and the rotor attached to the flex plate with two small screws. 
The screw just keep the rotor from moving back and forth.  The splines
actually spin it.  The stator will have to have the coils redone with a
fewer number of turns, and possibly a heavier guage wire, but it will
only take a few experiments to get the proper voltage output at 6000RPM.

 
Hi Ernest,
 
This is a nice thought, but I don't think it's going to be quite that simple with Tracy's drive.  There isn't a ton of space between the back of the drive adapter plate, and the flex plate.  There are lots of bolt heads on the rear (engine side) of the plate that hold the drive in place as well, which may or may not get in the way, depending on the diameter of the stator.  The dampener plate is on the front side (prop side) of the flex plate, and would provide a nice mounting point for the rotor, again depending on diameter of the rotor.  The rotor would have to be bolted, or riveted to the dampener plate securely, since there are no splines accessible.  The center hole in the rotor would have to be enlarged to clear the hub of the dampener plate as well.  
 
Do you know the diameter of this unit, and the thickness?  I do think the idea is the best I've heard, but it might take a custom built unit to do this.  I would bet we could get someone to build one, since everyone who's purchased one of Tracy's drives could use it, and would probably want to.  
 
Cheers,
Rusty (the network guy today)
 
We should not overlook the disadvantage of PM alternators. At higher operating speed, the not used output will have to be dissipated. This is the main reason why automotive alternators are regulated by the exitation system.
FWIW.
 
Richard Sohn
N-2071U
 
 




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