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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1815490@logan.com>
Subject: Re: [FlyRotary] Re: Engine Rebuild
Date: Wed, 7 Feb 2007 07:52:08 +1000
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 Ed,
I didn't know this before but apparently you an get over sized apex seals, I 
forget the increments.
George ( down under)

> Assuming the wear seals were all new - are we certain they were?  Some 
> rebuilders don't replace a wear part if it is within the manual's specs.
>
> In any case, if you are tearing it down, I would replace all rubber seals 
> such as coolant "O" rings and tension bolt seals.  I would go with Tracy's 
> apex seals.  Side seals and oil "O" ring seals should still be OK as well 
> as corner seals.
>
> Be certain and check that the apex seal slot is within specs regarding 
> wear or "V"ing of the slot walls.  That is what ( I am convinced)  caused 
> my apex seal failure at 160 hours.  The rotors were used  that I stuck in 
> my 91 rebuild and was not knowledgeable enough (then)  to check for apex 
> slot wear.  When I took them out after my apex seal failure, they were 
> worn well out side the specs - I suspect they were near or over the specs 
> when I installed them.
>
> Let us know what you find, Joe.
>
> Ed
>
> ----- Original Message ----- 
> From: "Joe Hull" <joeh@PilgrimTech.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Tuesday, February 06, 2007 11:29 AM
> Subject: [FlyRotary] Engine Rebuild
>
>
> Just got back from a trip to the Middle East – managed to catch a great 
> little airshow in Al Ain, UAE 
> (http://www.alainaerobaticshow.com/html/home.asp) while I was there – no 
> rotaries however ☺.
> But now – back to business…A couple of months ago I lost an apex seal 
> because of a failed spark plug electrode casing (that’s the only plausible 
> theory). At the time my daughter was living with us and I had no garage 
> because it was full of her furniture. But now she’s gone and I’m back – so 
> it’s time to rebuild.
> The engine has less than 100hrs on it – (say 6000-10000 miles in car 
> terms). And actually it has a lot less because Atkins rebuilt it about 30 
> hours ago because of low oil pressure - I'm just not sure whether he used 
> all new seals when he did that.
> Which leads me to the question - with those few hours on the engine - what 
> seals does it make sense to replace?
> Thanx,
> Joe Hull
> Redmond/Seattle WA, Cozy-Mazda Rotary 71hrs
>
>
>
>
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