Return-Path: Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3199793 for flyrotary@lancaironline.net; Fri, 30 Apr 2004 20:42:54 -0400 Received: from TOSHIBAjhr ([209.214.14.198]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with SMTP id <20040501004253.HTFW1745.imf24aec.mail.bellsouth.net@TOSHIBAjhr> for ; Fri, 30 Apr 2004 20:42:53 -0400 From: "John Slade" To: "Rotary motors in aircraft" Subject: Turbo - found the problem. Date: Fri, 30 Apr 2004 20:42:49 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0047_01C42EF3.B38AB880" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0047_01C42EF3.B38AB880 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Re: [FlyRotary] Re: FW: Sad storyI found the problem with my turbo. While reinstalling the turbo I decided that the feed line may be too small. The hose recommended by my local Mazda guru was #10 size which is about 1/8 ID. All the input I'm getting now says this hose needs to be 1/4 ID. Maybe the local guy was thinking about typical sporadic road use rather than the sustained usage I'll get in airplane use. When it came time to remove the old hose I noticed that it went under the alternator, and seemed stuck. The only way I could get it out was to release the alternator tension adjustment and lift the alternator up. The hose had been trapped between the alternator and the top of the engine. There HAD been enough clearance, but the belt tension had pulled the alternator downwards and crimped the feed line. I guess the tension bolt hadn't been tight enough, or it needs some friction washers. Blowing through the hose it was easy to feel the restriction caused by the crimp. Excellent! I love it when you find a definitive cause like that. There's a picture of the crimped hose in my web site, chapter 29 for anyone who's interested. John Slade (Onwards and upwards....) http://canardaviation.com/cozy ------=_NextPart_000_0047_01C42EF3.B38AB880 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: FW: Sad story
I found the problem with my=20 turbo.
While reinstalling the turbo I decided that = the feed=20 line may be too small. The hose recommended by my local Mazda guru = was =20 #10 size = which is about=20 1/8 ID. All the input I'm getting now says this hose needs to be 1/4 ID. = Maybe=20 the local guy was thinking=20 about typical sporadic road use rather than the sustained usage I'll get = in=20 airplane use. When it came=20 time to remove the old hose I noticed that it went under the=20 alternator, = and seemed=20 stuck. The only way I could get it out was to release the alternator = tension=20 adjustment and lift the alternator=20 up. The hose had been trapped between the alternator and the top of the = engine.=20 There HAD been enough clearance, but the belt tension had pulled the = alternator=20 downwards and crimped the feed line. I guess the tension bolt hadn't = been=20 tight enough, = or it needs=20 some friction washers. Blowing through the hose it was easy to feel the=20 restriction caused by the crimp.=20 Excellent! I love it when you find a definitive cause like that.=20
 
There's a picture of the crimped hose in my = web site,=20 chapter 29 for anyone who's interested.
 
John Slade (Onwards and=20 upwards....)
http://canardaviation.com/cozy
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