X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from email2k3.itlnet.net ([64.19.112.12] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 910690 for flyrotary@lancaironline.net; Thu, 21 Apr 2005 18:54:57 -0400 Received-SPF: none receiver=logan.com; client-ip=64.19.112.12; envelope-from=jwvoto@itlnet.net Received: from rav.itlnet.net (unverified [192.168.10.149]) by itlnet.net (Rockliffe SMTPRA 6.1.17) with SMTP id for ; Thu, 21 Apr 2005 17:54:12 -0500 Received: from JWVOTO (unverified [64.19.114.125]) by itlnet.net (Rockliffe SMTPRA 6.1.17) with SMTP id for ; Thu, 21 Apr 2005 17:54:11 -0500 Message-ID: <002a01c546c5$3d3c70c0$7d721340@JWVOTO> From: "Wendell Voto" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Apex Seal Groove Wear Date: Thu, 21 Apr 2005 17:54:35 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C5469B.2DF60420" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 This is a multi-part message in MIME format. ------=_NextPart_000_0027_01C5469B.2DF60420 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable With all the chatter about apex seal slot wear, thought I'd better check = my old engine. Could not get a .1mm gage in the slots beside the apex = seal, I think a .08mm would go in. Assume this is OK. Got my injectors cleared and spraying a good pattern, didn't know that = they sprayed with such a force. Rusty, looks like I won't be needing = your injectors after all. Wendell Hi! Kelly I must of mist Lynn's VST system, I don't understand what those = measurements are. I opened another 91 13b NA today & to my dismay it = was toast (supposably a Mazda rebuilt in '99) I measured at 90deg. to the apex slots with a digital vernier = caliper the reading I got on this one were from 2.26 to 2.43 mm the new = 2mm seal is 1.91 to 1.94 wide, the max allowable clearance is 0.1mm = therefore in this case the widest width should be 1.04mm so this slot = has 0.39 mm excess wear at the slot opening. Has anyone actually = measured a new rotor? I guess I will buy 2 new rotors now Georges=20 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 =20 =20 =20 =20 =20 =20 -------------------------------------------------------------------------= ----- -------------------------------------------------------------------------= ----- ------=_NextPart_000_0027_01C5469B.2DF60420 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
With all = the chatter=20 about apex seal slot wear, thought I'd better check my old engine.  = Could=20 not get a .1mm gage in the slots beside the apex seal, I think a .08mm = would go=20 in.  Assume this is OK.
 
Got my = injectors cleared=20 and spraying a good pattern, didn't know that they sprayed with such a = force.=20 Rusty, looks like I won't be needing your injectors after = all.
 
Wendell
 
 Hi! Kelly
I must of mist Lynn's VST system, I don't understand what = those=20 measurements are.  I opened another 91 13b NA today & = to my=20 dismay it was toast (supposably a Mazda rebuilt in '99)
I measured at 90deg. to the apex slots with a digital = vernier=20 caliper the reading I got on this one were from 2.26 to 2.43 mm = the new=20 2mm seal is 1.91 to 1.94 wide, the max allowable clearance is = 0.1mm=20 therefore in this case the widest width should be 1.04mm so this = slot=20 has 0.39 mm excess wear at the slot opening. Has anyone=20 actually measured a new rotor? I guess I will buy = 2 new rotors=20 now
Georges 
 



 
 Hi! Leon
You have a point regarding air filter use on water, = when Mt=20 St Helen (Washington state) erupted the first time I had a = shop in=20 Vancouver BC Canada (about 300miles away) even at that = distance,=20 one of the fleets of vehicle that we serviced had to have = the air=20 filters replaced every second day( even a week the=20 eruption).
 I made the crack about no need for an air = filter for a=20 float plane in Canada, but actually much of the time float = planes=20 are started on the lake shores with the engine above the = ground=20 instead of the water. The other thing about air filters on = an=20 airplane, an alternate air source (like a slightly spring = loaded=20 flat) should be supplied ( in a float plane case , water = could=20 splash onto the element & freeze solid at altitude, = blocking=20 air to the intake). On the rotor apex seal subject, I = agree with=20 you regarding the amount of wear on the rotor seal = slot &=20 seal has to be a lot more than Ed's  to spit out the = seals. I=20 drove my used engine supplier nuts yesterday, = measured 6=20 different  rotors  & all were from 2.13 to = 2.28 mm,=20 he old me they use these rotors regularly for a long time = &=20 never had a problem. Mine are 2.17 to 2.26mm, So I guess = I'l have=20 to buy new rotors.
Georges Boucher
 
 
 
 

 
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