X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3.5) with ESMTP id 1021075 for flyrotary@lancaironline.net; Fri, 24 Jun 2005 22:29:23 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-065-188-083-049.carolina.res.rr.com [65.188.83.49]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j5P2SaBI001315 for ; Fri, 24 Jun 2005 22:28:37 -0400 (EDT) Message-ID: <001301c5792d$9896dc40$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Engine Rebuild corner seal. Date: Fri, 24 Jun 2005 22:28:38 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C5790C.11401CF0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0010_01C5790C.11401CF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, thanks for the photo of your hypothesis. That coincides = with the hot spot being a bit below the bottom of the corner seal = circuit. It may not prove it, but it certainly provides some additional = plausibility to the theory. I think it answers how hot spots got on = both sides. The side with the stuck apex piece would certainly at the = narrowest width of the housing could have caused a hot spot due to the = friction. If at the same time the tip of the rotor was displaced toward = the opposite wall by this piece then that edge of the rotor could have = scraped that side housing - perhaps a bit lighter accounting for the = smaller hot spot. I'll take a close look at the photos of my engine when I get them and = look to see if we have one that might show the lightening holes on the = front rotor to see if there is any indication of something stuck and = perhaps moving in one. Lets see sloppy apex slots, implausible sticking of apex seal in = lightening hole, brake line break....., I think I stay on the ground = with "Honey Dos" for a while {:>) Besides, Tracy says my EC2 is so out of date he is embarrassed for me to = fly with it, so I promised him I would send it back for an update after = this trip - that should keep me on the ground for a while. Ed ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Friday, June 24, 2005 10:02 PM Subject: [FlyRotary] Re: Engine Rebuild corner seal. No way I could prove it in any case. However, as Rusty suggested if = the seal piece were somehow trapped in one of the lightening holes = milled near the rotor tips, it might just have enough room to rotate. = The Hot spots were both near the (near the exhaust port on the iron side = housings. No evidence of any overheating, scraps or anything on the = rotor housing. The hot spots were in just a tad further toward the = center than the inner most part of the corner seals. =20 Hi Ed, Well, from your description of the area, and the pics I'm attaching, I = have to say I think the theory is little more plausible. I still don't = understand how the dark spot would get on the other side though. =20 Also, if a seal was stuck here for some time, I see only one way for = it to get out. It's nearly impossible to take a good pic of the inside = of the intake port, but if you use your imagination, and take my word = for it, you'll note that the lightening hole lines up almost perfectly = with the intake port. I just can't imagine how much good luck you have = if that seal managed to pop out of the rotor and into the port cleanly = (without getting pinched on the edge, then got sucked back into the = rotor housing, passed through, and spit out without damaging anything = else. Might not even be possible unless it was worn down quite a bit. = Still might not be possible.=20 Better let your angel rest some before you fly again :-) Rusty (still thinking of trying a PP, just to see how it works) =20 -------------------------------------------------------------------------= ----- >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0010_01C5790C.11401CF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Rusty, thanks for the photo of your = hypothesis.  That=20 coincides with the hot spot being a bit below the bottom of the corner = seal=20 circuit.  It may not prove it, but it certainly provides some = additional=20 plausibility to the theory.  I think it answers how hot spots got = on both=20 sides.  The side with the stuck apex piece would certainly at the = narrowest=20 width of the housing could have caused a hot spot due to the = friction.  If=20 at the same time the tip of the rotor was displaced toward the opposite = wall by=20 this piece then that edge of the rotor could have scraped that side = housing -=20 perhaps a bit lighter accounting for the smaller hot spot.
 
I'll take a close look at the photos of my engine = when I get=20 them and look to see if we have one that might show the lightening holes = on the=20 front rotor to see if there is any indication of something stuck and = perhaps=20 moving in one.
 
Lets see sloppy apex slots, implausible sticking of = apex seal=20 in lightening hole, brake line break....., I think I stay on the ground = with=20 "Honey Dos" for a while {:>)
 
Besides, Tracy says my EC2 is so out of date he is = embarrassed=20 for me to fly with it, so I promised him I would send it back for an = update=20 after this trip - that should keep me on the ground for a = while.
 
Ed
 
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Friday, June 24, 2005 = 10:02=20 PM
Subject: [FlyRotary] Re: Engine = Rebuild=20 corner seal.

No way I could prove it in any case.  = However, as Rusty=20 suggested if the seal piece were somehow trapped in one of the = lightening=20 holes milled near the rotor tips, it might just have enough room to=20 rotate.  The Hot spots were both near the (near the exhaust port = on the=20 iron side housings.  No evidence of any overheating, scraps or = anything=20 on the rotor housing.  The hot spots were in just a tad further = toward=20 the center than the inner most part of the corner = seals.   
 
Hi=20 Ed,
 
Well,=20 from your description of the area, and the pics I'm attaching, I have = to say I=20 think the theory is little more plausible.  = I = still don't=20 understand how the dark spot would get on the other side=20 though.  
 
Also,=20 if a seal was stuck here for some time, I see only one way for it = to get=20 out.  It's nearly impossible to take a good pic of the inside of = the=20 intake port, but if you use your imagination, and take my word for it, = you'll=20 note that the lightening hole lines up almost perfectly with the = intake=20 port.  I just can't imagine how much good luck you have if that = seal=20 managed to pop out of the rotor and into the port cleanly (without = getting=20 pinched on the edge, then got sucked back into the rotor housing, = passed=20 through, and spit out without damaging anything else.  Might = not=20 even be possible unless it was worn down quite a bit.  Still = might=20 not be possible. 
 
Better let=20 your angel rest some before you fly = again :-)
 
Rusty (still thinking of trying a PP, = just to=20 see how it works)
 
 
 
  

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html
------=_NextPart_000_0010_01C5790C.11401CF0--