Mailing List flyrotary@lancaironline.net Message #10929
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: Engine run - Good news/bad news
Date: Mon, 30 Aug 2004 06:55:09 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
 
 ----- Original Message -----
From: Al Gietzen
Sent: Monday, August 30, 2004 1:14 AM
Subject: [FlyRotary] Re: Engine run - Good news/bad news

Subject: [FlyRotary] Re: Engine run - Good news/bad news

 

Al, Sounds like you are looking at the brass "sleeve" bearing around the prop shaft.  Should, of course,have an opening for the oil.  If this PSRU was run on the dyno it sounds that like either:

 

1. This condition existed before the dyno runs (could be a missed step in manufacturing) or

2. The sleeve has sheared its pins and spun in the casting.

 

Ed

 

Ed;

 

The run on the dyno was without redrive.  It has now run less than 10 minutes at low rpm, but with no trace of oil in the drain line, clearly there never was any flow.  Fortunately, I caught the problem early.  Presumably no damage to the drive.

 

Al

 

With the low rpms and minimum length runs, you are in all likelihood correct.  Since its still under warranty and it will have to be torn down to fix the problem - if there is any damage, it should be easy enough to replace the gears or whatever.  That is one of the things I like about Tracy's redrive as opposed to the Ross drive.  You needed a machine shop to replace anything associated with propeller shaft on the Ross.

 

Good luck, I will be interested to hear what the cause of the plugged oil inlet hole is.

 

Ed

 

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