Return-Path: Received: from fed1rmmtao05.cox.net ([68.230.241.34] verified) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3181055 for flyrotary@lancaironline.net; Tue, 20 Apr 2004 14:26:55 -0400 Received: from Leonards ([68.111.224.107]) by fed1rmmtao05.cox.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with ESMTP id <20040420182652.DKLZ11319.fed1rmmtao05.cox.net@Leonards> for ; Tue, 20 Apr 2004 14:26:52 -0400 From: "David Leonard" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Wanted - single stage turbo Date: Tue, 20 Apr 2004 11:27:54 -0700 Message-ID: <000b01c42705$326eabd0$6be06f44@Leonards> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C426CA.860FD3D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C426CA.860FD3D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit John, sorry to hear about the busted turbo. You caught my attention. Since I am in the middle of a rebuild I could think about changing my set-up. Do you think that the turbo was about to go anyway, or is it just not the right turbo for our application? Were you running a wastegate? What MAP were you running when the turbo blew? Rusty's turbo is the same as yours, do you plan to replace it with an Identical turbo? Todd and I (and Mecanair and perhaps some others) are also running that turbo. David Leonard The Rotary Roster: http://members.aol.com/_ht_a/rotaryroster/index.html -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Slade Sent: Tuesday, April 20, 2004 10:38 AM To: Rotary motors in aircraft Subject: [FlyRotary] Wanted - single stage turbo Rotarians, Does anyone have a good second gen single stage turbo they want to sell? Failing that - can someone recommend a good supplier / rebuilder? Yes, you guessed it - I flew for almost an hour this morning, then fried the turbo. I'd noticed a bit of slack in the bearings, so was expecting to have to rebuild it anyway - just not quite this soon. The good news is that the failure mode was fairly benign. I was trying out the turbo at 5000ft and just passing through 170 kts making large circles over the field. The rpm dropped from about the 4500 I was using to 3500 and no amount of throttle would increase it from there. Below 3500 the engine ran almost normally, so I had enough power to climb if needed. It was maybe a tad rough, but not so's you'd notice. An observer says I put out a puff of white smoke, and was trailing a small amout of white smoke as I headed back in for a normal landing. In all I ran the engine for about 10 minutes after the turbo shaft broke. I lost about 1 pint of oil and the same of coolant through the collapsed bearings, so perhaps another 10 minutes or more would have been ok if the field had been further. The exhaust wheel was floating around in the wastegate housing, but too large to get through the hole, so all it did was block the exhaust a bit. I guess this is the "experimental" part of the exercise. :) John Slade Rotary Cozy IV (currently sans turbo) ------=_NextPart_000_000C_01C426CA.860FD3D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

John, sorry to hear about the = busted turbo. You caught my attention. Since I am in the middle of = a rebuild I could think about changing my set-up. Do you think that the = turbo was about to go anyway, or is it just not the right turbo for our application? Were you running a wastegate? What MAP were you running when the turbo blew? Rusty’s turbo is the same as = yours, do you plan to replace it with an Identical turbo? Todd and I (and = Mecanair and perhaps some others) are also running that turbo. =

David Leonard

The Rotary = Roster:

http://memb= ers.aol.com/_ht_a/rotaryroster/index.html

-----Original Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Slade
Sent: Tuesday, April 20, = 2004 10:38 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Wanted - single stage turbo

Rotarians,

Does anyone have a good second = gen single stage turbo they want to sell?

Failing that - can someone = recommend a good supplier / rebuilder?

Yes, you guessed it - I flew for = almost an hour this morning, then fried the turbo. I'd noticed a bit of = slack in the bearings, so was expecting to have to rebuild it anyway - just not = quite this soon.

The good news is that the failure = mode was fairly benign. I was trying out the turbo at 5000ft and just passing through 170 kts making large circles over the field. The rpm = dropped from about the 4500 I was using to 3500 and no amount of throttle would = increase it from there. Below 3500 the engine ran almost normally, so I had enough = power to climb if needed. It was maybe a tad rough, but not so's you'd = notice. An observer says I put out a puff of white smoke, and was trailing a small = amout of white smoke as I headed back in for a normal landing. In all I ran = the engine for about 10 minutes after the turbo shaft broke. I lost about 1 = pint of oil and the same of coolant through the collapsed bearings, so perhaps = another 10 minutes or more would have been ok if the field had been = further. The exhaust wheel was floating around in the wastegate housing, but too = large to get through the hole, so all it did was block the exhaust a = bit.

I guess this is the "experimental" part of the exercise. :)

John Slade

Rotary Cozy IV (currently sans = turbo)

------=_NextPart_000_000C_01C426CA.860FD3D0--