Return-Path: Received: from fed1rmmtao08.cox.net ([68.230.241.31] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 383463 for flyrotary@lancaironline.net; Sun, 29 Aug 2004 11:46:41 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.31; envelope-from=daveleonard@cox.net Received: from davidandanne ([68.111.224.107]) by fed1rmmtao08.cox.net (InterMail vM.6.01.03.02.01 201-2131-111-104-103-20040709) with SMTP id <20040829154612.IGMP252.fed1rmmtao08.cox.net@davidandanne> for ; Sun, 29 Aug 2004 11:46:12 -0400 From: "DaveLeonard" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Engine run - Good news/bad news Date: Sun, 29 Aug 2004 08:46:15 -0700 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0029_01C48DA4.A4C23340" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 This is a multi-part message in MIME format. ------=_NextPart_000_0029_01C48DA4.A4C23340 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Al, check for foreign debris in the inlet too. Dave Leonard 2. The joy was short-lived because it was only a one minute run while I had the redrive drain line disconnected. Taking the drain line off gave the first clue. No sign that a drop of oil had ever been there. The amount of oil in the container after the run - zippo; not a drop. I took off the feed line and there was oil sitting in the fitting. Feeding to a container, I ran again for less than 30 seconds, and sent more than a pint into the container. Complete blockage inside the drive. The prospect of removing the prop, drive and disassembly is not a happy one. Al, something you might try before taking the gearbox off (a pain to say the least). Its been know for such stuff as the silicon grey sealant to plug up the drains. Yes, unlikely that it would have plugged up the front one. But, short of taking off the gear box you might try removing the drain fittings - just in the remote chance they could be plugged. Ed With two exits and 100 psi oil; my guess is it's highly unlikely that the explanation is 'foreign matter'. I think there is no oil going into the drive. It appears to me from the diagram that the oil goes in through a bushing via a hole and/or groove. Most likely a misalignment there giving the oil nowhere to go. I'll check further later today. Al ------=_NextPart_000_0029_01C48DA4.A4C23340 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Al,=20 check for foreign debris in the inlet too.
Dave=20 Leonard
 

2.=20 The joy was = short-lived=20 because it was only a one minute run while I had the redrive drain = line=20 disconnected.  Taking the drain line off gave the first = clue.  No=20 sign that a drop of oil had ever been there.  The amount of oil = in the=20 container after the run – zippo; not a drop.  I took off = the feed line=20 and there was oil sitting in the fitting.  Feeding to a = container, I=20 ran again for less than 30 seconds, and sent more than a pint into = the=20 container.  Complete blockage inside the drive.  The = prospect of=20 removing the prop, drive and disassembly is not a happy = one.=20

  

Al,=20 something you might try before taking the gearbox off (a pain to say = the=20 least).  Its been know for such stuff as the silicon grey = sealant to=20 plug up the drains.  Yes, unlikely that it would have plugged = up the=20 front one.  But, short of taking off the gear box you might try = removing the drain fittings - just in the remote chance they could = be=20 plugged.

 

Ed

With two exits and 100 psi = oil; my=20 guess is it’s highly unlikely that the explanation is = ‘foreign=20 matter’.  I think there is no oil going into the = drive.  It=20 appears to me from the diagram that the oil goes in through a = bushing via a=20 hole and/or groove.  Most likely a misalignment there giving = the oil=20 nowhere to go.  I’ll check further later = today.

 

Al

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