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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-180294@logan.com>
Subject: Re: [FlyRotary] Re: TES "O" Rings
Date: Wed, 20 Jul 2005 09:26:44 +1000
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Gary/Kelly,
Your figures seem more accurate given mine are too big.

The Oil rings are the same size I have now recorded.

The Inner coolant ring of 8.932 ID is indeed smaller than the 9.111 ID.
The Outer 11.182 is also smaller than my recorded 11.230 ID ( which is down
from Paul's original figure of 11.340") - I figure that yours must be right.

Gary, are your "O" rings red in the middle with a clear outer covering!?
It's just that it looks different to what I've seen in photo's.
Do Creavy take back and exchange?
George (down under)

> Hi Kelly;
>
> I believe Paul's numbers worked out to be:
>
> Oil O-rings
> 0.093 x 4.68
> 0.118 x 4.33
>
> coolant O-rings
> 0.093 x 8.932   (0.098 not available)
> 0.093 x 11.182
>
>
> I ordered the coolant orings with 9.00 and 11.25 ID, they fit without
> stretching and had a bit of slack, I would get slightly smaller next
> time.
> I should also add these were for an '86 NA.  I assume they are all
> supposed
> to be the same but I have seen some casting differences between
> housings.
>
> The 0.093 x 8.932 were originally listed as .098 but I was told by
> Creavey
> this size is not available.
> These appear to be narrow in the wide groove but have an approximately
> correct "nominal squeeze".
> Biggest problem seems to be getting the oring to stay in the groove
> with minimal hylomar during installation.
>
> I believe the ones you want are the SIL/PFA o-rings good to 500F.
> Ask for them specifically.
>
> Haven't run the engine yet to give any real feedback.
>
> Cheers
> Cary
>
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