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Front Mounted Governor vs. Rear Mounted Governor

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Speedy11(at)aol.com
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Posted: Mon Sep 21, 2009 9:40 am Post subject: Front Mounted Governor vs. Rear Mounted Governor

Matt,

 Now I'm starting to catch on.  I wondered why you were using a  McCauley governor.  You're using it to avoid buying another one.

 Good idea, but it may not work too well.  I have the MT governor with  the MT prop on the IO-390 and, although there were some problems to solve, it  works reasonably well.  There are problems to solve no matter which one you  use.  Nothing is bolt on.

 Stan Sutterfield

 Do not archive

  

  	  Quote: 	
		  I just    discovered something very interesting.  The gear ratio is different    between

a Front mounted governor and a Rear mounted governor - .947 to 1    (front) vs.

.866 to 1 (rear).  So that means that the McCauley    governor that I have that

I originally purchased for use with and O-360    won't even work with the IO-390.

This page from the PCU5000 web site is    very informative:



           http://www.pcu5000.com/pcu5000x.htm



It details the various ratios and    what not.



I also found a PDF on the dimensions of the MT governor that    Van's sells:



           http://www.mt-propeller.com/pdf/manuals/e-1048.pdf



This MT governor is    also 1" shorter than the McCauley governor similar to the    PCU5000:



           http://www.pcu5000.com/pcu5000x_spec.pdf



In this picture of the    PCU5000:



           http://www.pcu5000.com/index_i/hmpg_pic.gif 



the PCU5000 shows an    auxiliary control arm that might be very helpful in pushing

the control    cable out of the way of the fiberglass intake.  Although, I think

that    just moving the control arm in by 1" compared to the McCauley is going

to    be plenty.



At any rate, I've ordered a PCU5000X number    "P-520-029/A-947" for my RV-8/IO-390

combination so hopefully I can move    forward on this project...



Matt Dralle

	


 

  

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