Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 881162 for flyrotary@lancaironline.net; Sun, 17 Apr 2005 18:33:46 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from 204.127.135.29 ([204.127.135.29]) by worldnet.att.net (mtiwmhc12) with SMTP id <2005041722330711200llqm3e>; Sun, 17 Apr 2005 22:33:17 +0000 Received: from [209.247.222.91] by 204.127.135.29; Sun, 17 Apr 2005 22:33:05 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: Apex Seal Groove Wear Date: Sun, 17 Apr 2005 22:33:05 +0000 Message-Id: <041720052233.11116.4262E4210000C33500002B6C2160375964019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_11116_1113777185_0" --NextPart_Webmail_9m3u9jl4l_11116_1113777185_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Georges, Have you tried Lynn's VST (Vertical Seal Test) for apex slot wear and if so what measurement did you get ? Lynn suggests that 3/16 inch (.1875 inch) or 4.7625 mm as the outer limit........Of course after all the posts on this subject everyone may have their own personal limit !! -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Echo Lake Fishing Resort (Georges Boucher)" : -------------- Hi! Leon You have a point regarding air filter use on water, when Mt St Helen (Washington state) erupted the first time I had a shop in Vancouver BC Canada (about 300miles away) even at that distance, one of the fleets of vehicle that we serviced had to have the air filters replaced every second day( even a week the eruption). I made the crack about no need for an air filter for a float plane in Canada, but actually much of the time float planes are started on the lake shores with the engine above the ground instead of the water. The other thing about air filters on an airplane, an alternate air source (like a slightly spring loaded flat) should be supplied ( in a float plane case , water could splash onto the element & freeze solid at altitude, blocking air to the intake). On the rotor apex seal subject, I agree with you regarding the amount of wear on the rotor seal slot & seal has to be a lot more than Ed's to spit out the seals. I drove my used engine supplier nuts yesterday, measured 6 different rotors & all were from 2.13 to 2.28 mm, he old me they use these rotors regularly for a long time & never had a problem. Mine are 2.17 to 2.26mm, So I guess I'l have to buy new rotors. Georges Boucher --NextPart_Webmail_9m3u9jl4l_11116_1113777185_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Georges,

Have you tried Lynn's VST (Vertical Seal Test) for apex slot wear and if so

what measurement did you get ? Lynn suggests that 3/16 inch (.1875 inch)

or 4.7625 mm as the outer limit........Of course after all the posts on this subject

everyone may have their own personal limit !!

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from "Echo Lake Fishing Resort (Georges Boucher)" <echolakeresort@telus.net>: --------------

Hi! Leon

You have a point regarding air filter use on water, when Mt St Helen (Washington state) erupted the first time I had a shop in Vancouver BC Canada (about 300miles away) even at that distance, one of the fleets of vehicle that we serviced had to have the air filters replaced every second day( even a week the eruption).

I made the crack about no need for an air filter for a float plane in Canada, but actually much of the time float planes are started on the lake shores with the engine above the ground instead of the water. The other thing about air filters on an airplane, an alternate air source (like a slightly spring loaded flat) should be supplied ( in a float plane case , water could splash onto the element & freeze solid at altitude, blocking air to the intake). On the rotor apex seal subject, I agree with you regarding the amount of wear on the rotor seal slot & seal has to be a lot more than Ed's to spit out the seals. I drove my used engine supplier nuts yesterday, measured 6 different rotors & all were from 2.13 to 2.28 mm, he old me they use these rotors regularly for a long time & never had a problem. Mine are 2.17 to 2.26mm, So I guess I'l have to buy new rotors.

Georges Boucher

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