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From: Dale Rogers <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: E-shaft permanent magnet alternator
Date: Fri, 25 Feb 2005 9:13:23 -0500
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Umm,

   What about a press-fit collar on the re-drive input 
shaft, between the flex-plate connector and the bearing 
cover?

Dale R.
COZY MkIV #1254

> From: Ernest Christley <echristl@cisco.com>
> Date: 2005/02/24 Thu PM 02:21:21 EST
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: E-shaft permanent magnet alternator
> 
> Balance.  Control that and you're golden.  Get it off center by a little 
> and...well...I don't know what would happen...but I BET that it wouldn't 
> be good 8*)
> 
> I like the idea of using the splines, because that will control the 
> balance, and provide solid trap for all the radial forces driving the 
> system.  With the screws, you're depending on them for both radial and 
> axial forces.  Not that they can't be sized appropriately,  I just don't 
> think they'd be as dependable as the spline.
> 
> Finn, while true that the generator should get some cooling air flow, I 
> don't think there is much chance of the magnets coming loose from a 
> decently built unit.  The magnets are glued to the inside of a can.  The 
> very substantial centrifugal will push them harder into the inside 
> wall.  If they can provide robust service to the barking Harleys that 
> certain people have been so fond of the past few years while only 
> spinning at 3000RPM, I think they'd be outstanding performers spinning a 
> 6000 in a Mazda that goes Hmmm...