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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-870187@logan.com>
Subject:  : V shape Apex Seal Slots?
Date: Sat, 16 Apr 2005 14:19:54 -0400
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 >
> << 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??? >>
>
>
> The slot is perfectly straight. No taper at all. If you stand a new or
near
> new apex seal on end in the slot, the exposed end should not move more
than
> (about) 3/16" total. New slot and new seal gives nearly no movement. The
3/16"
> would be end of life span.
>
> Snip>
> I grew up during W.W.II and you were literally not allowed to throw
anything
> away. So I don't (until recently).
>
> Lynn E. Hanover


Just went out and stuck an apex seal in the 3 slots of the undamaged rotor
per Lynn's method above.  The seal could be move 4/16" of an inch from one
extreme to the other in all the slots - so appears the rotors are past their
useful life (as if there weren't other indications of that {:>)).  Good
little rule of thumb.  Thanks Lynn

Ed A