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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-870017@logan.com>
Subject: Re: [FlyRotary] Re: V shape Apex Seal Slots?
Date: Fri, 15 Apr 2005 16:47:24 +1000
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Ed,
I gave my response in clearances ( as per the manual) I don't know if the
apex seals vary slightly or not - I assume they do, but even if the groove
is even ( Top to Bottom ) too much slop is a problem.
George( down under)

> On Thu, 14 Apr 2005 16:26:19 -0500, Russell Duffy wrote:
> > Apex Location Base Top
> >
> >
> > Seal1 1.99mm 2.16 - 2.26mm Seal2
> > 1.98mm 2.22 - 2.25mm Seal3
> > 1.98mm 2.18 - 2.20mm Clearly the slot is larger at
> > the top - is this due to design or is this due to wear? Lynn???
> > Anybody? Hi Ed, I still have the brand new rotor that was
> > dropped by the ceramic coaters, and I just measured the two un-
> > smashed apex seal slots. I also measured the slots on the dead
> > rotor that was involved in my oil out adventure. All the slots
> > measure 1.89mm, with no sign of being larger at the top of the slot
> > than the bottom. Cheers, Rusty (my kingdom for a decent
> > contractor)
>
>
> Just for the record, how did you guys measure those slots to this degree
of
> accuracy?
> What tools were used?  Were the slots absolutely spotless?
>
> Jim Brewer
>
> Jim, I used $19 digital readout calipers - great tools and reasonably
> accurate.  The rotor slots were reasonably clean and I did scrap the small
> amount of carbon away.  In any case, if there were carbon deposites at the
> top of the slots they would have resulted in a smaller not larger gap than
> the bottom.
>
> If had had to have only one "precision" measuring tool, it would be one of
> those $19.00 digtal calipers.
>
> Ed
>
>
>
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>
>
>
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