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Date: Mon, 14 Apr 2008 21:40:24 -0700
From: Dale Rogers <dale.r@cox.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Uh oh, this can't be good - RD-1B PSRU woes
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Chris,

   A little more seriously - I suspect the black plastic used to be
the bearing cage, that kept the rollers evenly spaced around the
bearing race.  The blue or black tint on the rollers (as well as
the melted plastic) suggest that things got a bit over-heated?  Are
you sure that the re-drive was actually getting any oil inside of
it?

Dale R.


Christopher Barber wrote:
> Correct me if I am wrong, but the stuff inside my RD-1B shown in the 
> attached pictures, I am guessin' is not good.  For as much as I know 
> about PSRU engineering, maybe the loose pellets are an "added feature."
>  
> While I was remounting my newly built 13b back on to the rear of the 
> Velocity I decided to try to hunt down a pesky PSRU oil leak that had 
> been problematic before the engine tear down/build of the last few 
> weeks.  I could not see anything obvious, so feeling emboldened after 
> building my second gen 13b with all new housings last week, before I 
> mounted the re-drive onto the newly installed engine, I removed the 
> through bolts holding the PSRU together
>  
> DOH! What the hell are all those little pellets and fragments of black 
> plastic??????
>  
> What gives? This unit was on the engine for about 6 of the 8 hours on 
> the old engine (those first two unloaded hours may be part of the 
> reason for my need for a new engine<??>  What went wrong?  What is the 
> cure?
>  
> I am thinking I need to crate this up and ship it off to RWS for 
> review and repair.  Maybe it will get there about the same time as 
> folks return from Sun & Fun.
>  
> I was so happy putting everything back together following the engine 
> build.  I thought I would be ready for first start tomorrow.  Well, 
> since I am well acquainted with Murphy and knowing full well that 
> Murphy and his little law is quite optimistic, I am on semi-hold.
>  
> Thanks for any insight.
>  
> All the best,
>  
> Chris
> Houston
>
> ------------------------------------------------------------------------