Mailing List flyrotary@lancaironline.net Message #20278
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: V shape Apex Seal Slots?
Date: Thu, 14 Apr 2005 22:59:34 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks, Dave
 
I have considered that, but not really keen on using 3mm seals and the one rotor does have its slot mashed together although I imagine that milling it to 3mm would remove the damage.  I think I am going to spring for NEW rotors even if the old RX-7 9.7:1 ones.
 
Ed
----- Original Message -----
Sent: Thursday, April 14, 2005 10:10 PM
Subject: [FlyRotary] Re: V shape Apex Seal Slots?

Umm.. dont forget you can always have them milled out to 3mm.. and salvage if there is no other damage.
 
Dave S

Ed Anderson wrote:
Thanks Rusty, that confirms my suspicions that the rotors are shot.  You can bet I'll check ever rotor from now on. lesson learned.
 
Ed
----- Original Message -----
Sent: Thursday, April 14, 2005 5:26 PM
Subject: [FlyRotary] Re: V shape Apex Seal Slots?

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) 

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