X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 998688 for flyrotary@lancaironline.net; Sun, 26 Feb 2006 10:47:56 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-025-165.carolina.res.rr.com [24.74.25.165]) by ms-smtp-04-eri0.southeast.rr.com (8.13.4/8.13.4) with SMTP id k1QFl9Ju004468 for ; Sun, 26 Feb 2006 10:47:11 -0500 (EST) Message-ID: <000a01c63aeb$f072d1a0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Hi Chuck [FlyRotary] Rotor identification Date: Sun, 26 Feb 2006 10:47:24 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C63AC2.0759F440" 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_0007_01C63AC2.0759F440 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageHi Chuck, I would check the apex slots of the rotors you are about to install = (before installation {:>)) to see that the specifications are within = tolerance. Using Tracy's seals, its less likely a "V" slot would cause = them to break (at least not as easily), but after my experience in = loosing a rotor, I would not install a used rotor without knowing how = close to the limits the apex seal slot was. My $ 0.02 worth Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ----- Original Message -----=20 From: Chuck Dunlap=20 To: Rotary motors in aircraft=20 Sent: Saturday, February 25, 2006 10:09 PM Subject: [FlyRotary] Re: Hi Chuck [FlyRotary] Rotor identification Thanks Ed, that is just what I was looking for. Those masurements = prove that one is a 9.7 and one is a 9.4, just as Kelly surmised from = the photo. Fortunately I have another rotor that matches the 9.4 so I still have = a good pair. I will check the apex slots as soon as I get them cleaned up. It will = be at least another week before I can get the bad motor home and torn = apart, I will sure post the results as soon as I can. Chuck -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Ed Anderson Sent: Saturday, February 25, 2006 5:53 PM To: Rotary motors in aircraft Subject: [FlyRotary] Hi Chuck [FlyRotary] Rotor identification Hi Chuck Here is what I found about some of the different compression rotors. = If you lay a straight edge across the depression longwise and measure = from the bottom of the straight edge to the deepest part of the = depression this what I have found: for the 9.7:1 the depth is 4mm, for = the 9.4:1 it is 5.5mm and the 9.1 is 7 mm. I have nothing to determine = their weight other than the compression/weight correlation. Also, I would carefully check the apex seal slots, they can be worn = on used rotors and that is what I am convinced caused my apex seal to = break. They become "v" at the top and no longer provide the wall = support for the top of the seal, the center of the seal tends to break = and leave the slot causing other damage. Lynn Hanover provided this quick check. If you stick the end of = an apex seal length wise into the slot (keeping it vertical) and move it = from side to side so that it touches first one side of the slot and then = the other, the far end of the seal should move in an arc of no more than = 3/16" of an inch - if it move more than that the slots have "V" passed = specifications. When you get the time, we all would like to hear what you found and = what you believe the cause. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ----- Original Message -----=20 From: Chuck Dunlap=20 To: Rotary motors in aircraft=20 Sent: Saturday, February 25, 2006 6:48 PM Subject: [FlyRotary] Rotor identification I bought this pair of used rotors to build up a new motor so I can = retrieve my RV-6. They look different in the compression chamber "tub" = area, otherwise they look identical. They both are marked "D" for the = weight code. Can anyone identify these and verify if they are OK to use = ? I am thinking if the compression ratio is different, it may run rough = even if they weigh the same. I remember Ed posting something about a way = to measure the depth, but I cannot find it in my sea of saved emails. Chuck Dunlap N616RV 13B -------------------------------------------------------------------------= - -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_0007_01C63AC2.0759F440 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Hi Chuck,
 
I would check the apex slots of the rotors you = are about=20 to install (before installation {:>))  to see that the = specifications=20 are within tolerance.  Using Tracy's seals, its less likely a "V" = slot=20 would cause them to break (at least not as easily), but after my = experience in=20 loosing a rotor, I would not install a used rotor without knowing how = close to=20 the limits the apex seal slot  was.  My  $ = 0.02=20 worth
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.com
----- Original Message -----
From:=20 Chuck = Dunlap=20
Sent: Saturday, February 25, = 2006 10:09=20 PM
Subject: [FlyRotary] Re: Hi = Chuck=20 [FlyRotary] Rotor identification

Thanks Ed, that is just what I was looking for. Those = masurements prove=20 that one is a 9.7 and one is a 9.4, just as Kelly surmised from = the=20 photo.
Fortunately I have another rotor that matches the 9.4 so I = still have a=20 good pair.
I=20 will check the apex slots as soon as I get them cleaned up. It will be = at=20 least another week before I can get the bad motor home and torn apart, = I will=20 sure post the results as soon as I can.
 
Chuck
-----Original Message-----
From: = Rotary motors=20 in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of = Ed=20 Anderson
Sent: Saturday, February 25, 2006 5:53 = PM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Hi Chuck=20 [FlyRotary] Rotor identification

Hi Chuck
 
Here is what I found about some of the = different=20 compression rotors.  If you lay a straight edge across the = depression=20 longwise and measure from the bottom of the straight edge to the = deepest=20 part of the depression this what I have found: for=20 the 9.7:1 the depth is 4mm, for the 9.4:1  it is 5.5mm and the = 9.1 is 7=20 mm.  I have nothing to determine their weight other than the=20 compression/weight correlation.
 
Also, I would carefully check the apex seal = slots,=20 they can be worn on used rotors and that is what I am convinced = caused my=20 apex seal to break.  They become "v" at the top and no longer = provide=20 the wall support for the top of the seal, the center of the seal = tends to=20 break and leave the slot causing other damage.
 
 Lynn Hanover provided this quick = check. =20  If you stick the end of an apex seal length wise into the slot = (keeping it vertical) and move it from side to side so that it = touches first=20 one side of the slot and then the other, the far end of the seal = should move=20 in an arc of no more than 3/16" of an inch - if it move more than = that the=20 slots have "V" passed specifications.
 
When you get the time, we all would like to = hear what=20 you found and what you believe the cause.
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com
 
 
----- Original Message ----- =
From:=20 Chuck=20 Dunlap
To: Rotary motors in = aircraft=20
Sent: Saturday, February = 25, 2006=20 6:48 PM
Subject: [FlyRotary] Rotor=20 identification

I bought this=20 pair of used rotors to build up a new motor so I can retrieve my = RV-6.=20 They look different in the compression chamber "tub" area, = otherwise they=20 look identical. They both are marked "D" for the weight code. = Can=20 anyone identify these and verify if they are OK to use ? I am = thinking if=20 the compression ratio is different, it may run rough even if=20 they weigh the same. I remember Ed posting something about a = way to=20 measure the depth, but I cannot find it in my sea of saved=20 emails.
 
Chuck=20 Dunlap
N616RV=20 13B

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Homepage:  http://www.flyrotary.com/
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