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----- Original Message -----
From: "Jim Brewer" <alpha@concordnc.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, April 14, 2005 9:23 PM
Subject: [FlyRotary] Re: V shape Apex Seal Slots?
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
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
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