Return-Path: Received: from smtp104.mail.sc5.yahoo.com ([66.163.169.223] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with SMTP id 572538 for flyrotary@lancaironline.net; Sat, 18 Dec 2004 17:28:23 -0500 Received-SPF: none receiver=logan.com; client-ip=66.163.169.223; envelope-from=prvt_pilot@yahoo.com Received: from unknown (HELO stevehome) (prvt?pilot@24.136.229.34 with login) by smtp104.mail.sc5.yahoo.com with SMTP; 18 Dec 2004 22:27:50 -0000 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Engine damage thoughts Date: Sat, 18 Dec 2004 17:27:42 -0500 Message-ID: <002201c4e550$caa91700$6b01a8c0@workgroup.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0023_01C4E526.E1D495A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.6604 (9.0.2911.0) X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0023_01C4E526.E1D495A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit MessageRusty, I'm no expert on the rotary, but in general you could do a compression check/ If you had any previous compression readings to compare it to, that would be especially good. With that said, and if were me, I'd tear it down and check it out. For starters, it's not hard to do, and not expensive. Even if everything looked good, I'd always be wondering about those bearings, but that's just me. FWIT Steve Brooks -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Russell Duffy Sent: Saturday, December 18, 2004 12:37 PM To: Rotary motors in aircraft Subject: [FlyRotary] Engine damage thoughts Greetings again, I've been thinking more about the engine, and wondering what the chances are that there's any damage inside. I'm pretty sure I noticed the oil about the instant it started to lose any significant amount. As soon as the oil started to leak, I pulled the engine back to idle, and descended ASAP. I'm sure I was doing at least 2000 fpm from 6000 to 2000 ft, which only accounts for 2 minutes of time. At 2000 ft, is when I tried to throttle up, and the engine quit, so no time after that counts. I'm absolutely sure the engine quit because I had the mixture knob set way lean for cruise, and not because it seized up. This means that at worst, the engine idled for 2 minutes with no oil pressure. My guess would be that it was more like 30 seconds or less. With this in mind, I'm thinking that it's worth doing some ground runs of the engine to see how healthy it seems. If I can thoroughly run it on the ground without problems, then I can follow that with about 10 hours of circling the field. By that point, I can't imagine having any further concerns. If there was a problem, it would damage the engine further, but still continue to until I made it to an airport. If I'm wrong about how much damage there might be, it will get expensive, but shouldn't be life threatening. Many of you have a lot more experience with these engines than I do. Does this sound like a reasonable plan? Thanks, Rusty (late for the airport as always) ------=_NextPart_000_0023_01C4E526.E1D495A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Rusty,
I'm no=20 expert on the rotary, but in general you could do a compression = check/  If=20 you had any previous compression readings to compare it to, that would = be=20 especially good.
 
With=20 that said, and if were me, I'd tear it down and check it out.  For=20 starters, it's not hard to do, and not expensive.  Even if = everything=20 looked good, I'd always be wondering about those bearings, but that's = just=20 me.
 
FWIT
 
Steve=20 Brooks
 
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Russell=20 Duffy
Sent: Saturday, December 18, 2004 12:37 = PM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Engine damage = thoughts

Greetings=20 again,
 
I've been = thinking more=20 about the engine, and wondering what the chances are that there's any = damage=20 inside. 
 
I'm pretty = sure I noticed=20 the oil about the instant it started to lose any significant = amount.  As=20 soon as the oil started to leak, I pulled the engine back to idle, and = descended ASAP.  I'm sure I was doing at least 2000 fpm from = 6000 to=20 2000 ft, which only accounts for 2 minutes of time.  At 2000 ft, = is when=20 I tried to throttle up, and the engine quit, so no time after that=20 counts.  I'm absolutely sure the engine quit because I had = the=20 mixture knob set way lean for cruise, and not because it seized = up. =20
 
This means = that at worst,=20 the engine idled for 2 minutes with no oil pressure.  My guess = would be=20 that it was more like 30 seconds or less.  With this in mind, I'm = thinking that it's worth doing some ground runs of the engine to see = how=20 healthy it seems.  If I can thoroughly run it on the ground = without=20 problems, then I can follow that with about 10 hours of circling the=20 field.  By that point, I can't imagine having any further = concerns. =20 If there was a problem, it would damage the engine further, but still = continue=20 to until I made it to an airport.  If I'm wrong = about how=20 much damage there might be, it will get expensive, but shouldn't be = life=20 threatening. 
 
Many of you = have a lot=20 more experience with these engines than I do.  Does this sound = like a=20 reasonable plan?
 
Thanks,
Rusty (late = for the=20 airport as always)
 
 
 
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