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Ed,
Good thinking and good to get the
feed-back.
I do believe we are starting to see a trend, in
regard to apex seal slot wear. I believe the problem is that it's starting
to give the rotary, for Aviation use, a bad name, and it's the sort of thing
that could easily do it.
When you think about it, too much slop is going to
aggravate the apex seal side wear, which could have resulted in those
chatter marks.
George ( down under)
George, the rotor housings had some wear - but no
gouges or groves, no missing chrome - so they were probably OK to reuse
again. However, there was what appeared to be "chatter" wear - strips
across the chrome at regular intervals. When you rubbed your fingers
along them I could detect a faint wave like pattern (valleys and peaks).
So decided with new rotors and seals to go with new rotor housings.
Those were used ones and who knows how many miles they might have had.
Well, I was quite surprised at the amount of wear
on the seals - they were brand new 150 hours ago but the seals were
badly grooved and worn - now I am certain that wear was greatly accelerated by
the poor condition of the seal slots - but still. In any case, new
stronger seals are going to be used next - as well as additional of an air
filter. I personally don't think an airfilter would have made any
difference in the apex seal breaking - but, I also noticed that the rotor
metal oil rings were worn outside the specs and they were new 150 hours
ago. So I do believe I have had some accelerated wear due to the dust in
and around my hangar over the past two years. Since a filter is cheap,
I'm going to stick one on.
Ed
----- Original Message -----
Sent: Friday, April 22, 2005 6:23
PM
Subject: [FlyRotary] Re: All Parts have
arrived, Whew!
Ed,
Were the old housing junked because you spat
the apex seals?
I just got a report that one bloke in Victoria
Aust is only getting 200 hrs out of new seals before they break - I wonder
if it's the same problem? I'm pretty sure it is!
George ( down under)
Ok, folks, the fun begins. Got the last
of the parts in today, so can start the assembly tomorrow. Waited for
UPS to deliver the oil control rings all day - so was down in the
dumps when 1600 rolled around and no UPS truck. So maundered
down to the mail box and their wedged into its opening was a USPS
package - not UPS!
Going to sit down tonight with a bowl of pop
corn and watch Bruce T perform the assembly part. I noticed
that the transcript did not have anything on the reassembly - so assume
that I either got tired of listening to Bruce, figured that the assembly
was just the reverse of the disassembly - or lost that part.
Got all the rotor parts in plastic sandwich
bags marked for which rotor, which side of rotor and which apex. For
most parts it really doesn't matter but, for instance, is very important
when replacing the oil control seals to put the springs back correctly
according to direction of rotation and side of the rotor. Also
important on the side seals to get them in the right slot or else all that
work trimming the side seals to get that precision fit is
lost.
First time I've actually had new rotors and
housings - I like the looks - though not necessarily what they
cost. But, Bruce gave the best price out of three quotes I
got. Just wanted you to know.
Ed
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