Mailing List flyrotary@lancaironline.net Message #32311
From: Bobby J. Hughes <bhughes@qnsi.net>
Subject: RE: [FlyRotary] Re: Renesis Crank Angle Sensor
Date: Fri, 16 Jun 2006 08:31:13 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Bill,
 
I was thinking the same thing about the pulley but only the alternator. I had two alternator pulleys made to almost match the main pulley size. They cost me  $125 each but should prolong the life of the alternators.
 
Bobby


From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of WRJJRS@aol.com
Sent: Friday, June 16, 2006 12:09 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Renesis Crank Angle Sensor

In a message dated 6/15/2006 6:24:03 AM Pacific Standard Time, Lehanover@aol.com writes:
Lynn,
 
A toothed belt makes sense. I was thinking ribbed or V.
 
Bobby
Bobby,
 
Lynn mentioned this once but it bears repeating, the crank angle sensor is just that. You must be sure that the angle of the toothed wheel and the e-shaft remain in proper timing! Even a very small variance is bad. Your tolerance would have to stay at +- .5 degrees max. That isn't possible with anything but a toothed belt or direct attachment. (which is much better) I had a brain wave one time and thought if people are getting undersized pulleys made, why not raise a flange on both sides and cut the tooth pattern in it? This would be very reliable and would allow 2 pickups for redundancy. The patterns could be cut at the same angle or 180° or whatever angle allowed the easiest mounting of a second pickup.
Bill Jepson
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