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Now that you mention it, there was a "lightening" hole on
that corner of the rotor -but, then most corners have one or two. I
initially thought perhaps a cocked bearing might have caused it - but, if that
were the case I would expect to see the "hot" spots at opposite ends of the
chambers rather than together. Also, no sign of wear on the bearings which
was surprising - I expected to see scuff marks and such but none on either the
rotor or stationary bearing - so those oil pressure bearings must take lots of
loading.
I kept my engine as stock as possible so that if need
arise I could throw in a "junk-yard" engine to get home. The only part I
would need from my engine is the water pump housing which has an AN-16 male
fitting threaded into the inlet. I finally had to buy a 2 1/8" socket
(everyone had plenty of 2 1/4 and 2" sockets to loan- naturally). Not
counting the tools and 1/2 interest with my brother-in-law in an engine lift I
purchased, the total cost in parts was $220. So not too bad - of course
only the soft seals and one apex seal set were required to get it running
again.
It fired on the first turn of the prop and I hit 6200 rpm
static with this engine rebuild on a 80F morning - best yet.
Ed
----- Original Message -----
Sent: Friday, June 24, 2005 3:25 PM
Subject: [FlyRotary] Re: Engine Rebuild -
Coolant Leak Cause
I am certainly open to other hypothesis that explains
the two hot spots across from one another. I agree it doesn't seem
possible, but it sure looks like something was rubbing and then
pushing/cocking the rotor over at that point. My nephew took
some photos when we disassembled the engine, but I have not yet received
them. I'll post them to the list once I do.
It will be
interesting to see the pics, not only of the housings, but also the
rotor. If there was that much wear to create a blued spot on
the housing, you would expect there had to be a similar spot on the rotor, at
least on the side without the jammed object. I still don't see how
that could be anywhere but at the thrust surface, or gear of the rotor
though.
I did
think of a way the corner piece could fit, and that would be if it
happened to land in one of the large, milled balancing holes near
the corner of the rotor. It's still a hard theory to swallow.
Certainly nothing good could come from it though.
Rusty
(wondering if we should keep a loaner engine in the
group)
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