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Message-ID: <ABFAFD9525D34EF79CE3D73E1A8D2352@JohnPC>
From: <downing.j@sbcglobal.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-4842935@logan.com>
In-Reply-To: <list-4842935@logan.com>
Subject: Re: [FlyRotary] Marcotte PSRU
Date: Fri, 11 Feb 2011 20:24:37 -0500
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Tom, I have an early Marcotte PSRU on a 13B Mazda in a Wittman Tailwind and 
it has so far been a real DUD.  The pilot bearing was a bushing which didn't 
work out.  It was replaced with a needle bearing that couldn't stand 
torisional movement of the crankshaft and the PSRU input shaft, this design 
has now been replaced by a double bearing arrangement on the input shaft to 
eliminate the pilot bearing.  Twice I have lost the oil, 80W, first time due 
to a vent tank for expansion, the second time the output shaft seal fell out 
due to the aluminum case expanding faster that the seal, resulting in a fire 
at 4000 AGL at 190 MPH resulting in a bad landing in a wheat field.   I have 
had no luck contacting Marcotte about getting any information on the redrive 
and all I know about all the problems I have read in the Contact Magazine, 
so in my opinion it is a true field test operation and buyer beware.  JohnD
----- Original Message ----- 
From: "Thomas Giddings" <tom@midwestaviation.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, February 08, 2011 7:24 PM
Subject: [FlyRotary] Marcotte PSRU


Has anyone on this list had any experience or is using the Marcotte PSRU 
with constant Speed  Prop option ? If not are there any solutions to the 
Hydraulic prop governor out there? Thanks

Kid Regards
Tom Giddings


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