Mailing List flyrotary@lancaironline.net Message #49275
From: <WRJJRS@aol.com>
Subject: Re: [FlyRotary] Re: Next generation re-drive
Date: Tue, 1 Dec 2009 16:43:07 EST
To: <flyrotary@lancaironline.net>
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Pat is correct of course. I have used many magnetically coupled devices for transmitting power in vacuum. The common problem with using them for power transmission is that they are Heavy, (capital H). The other thing to find out is if the devices will scale as high as 300 HP. How big will they be at that size? I hate to be a naysayer but the strongest magnets I have ever used wouldn't work, and still fit in an airplane! I would love to find out that advances in materials would make this possible for us, but don't bet the farm on it.
Bill Jepson
 
In a message dated 12/1/2009 11:25:56 AM Pacific Standard Time, Panzera@Experimental-Aviation.com writes:

and if you get a prop strike the magnetic gears spin free so you wind up replacing just the prop instead of the prop, the PSRU and some expensive engine parts.  

 

 

I’m not so sure about that.

 

If the magnetic coupling is strong enough to transmit 200-300 HP from the engine to the prop,

an abrupt stoppage of the prop will get transferred to the crank.

 

Pat

 

 

 

 

 

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