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Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 01 Apr 2003 22:00:02 -0500 Message-ID: X-Original-Return-Path: Received: from [63.150.227.63] (HELO admsmxsint01.jocoks.com) by logan.com (CommuniGate Pro SMTP 4.1b2) with ESMTP id 2101042 for lml@lancaironline.net; Tue, 01 Apr 2003 17:15:14 -0500 Received: by mail1.jcnc.info with Internet Mail Service (5.5.2650.21) id ; Tue, 1 Apr 2003 16:15:09 -0600 X-Original-Message-ID: <4B9B1B1833408C40AE2F14A881F276F610B2FB@admsmxs2usr10.ad.jocoks.com> From: "Metcalfe, Lee, AIR" X-Original-To: 'Lancair Mailing List' Subject: RE: [LML] Re: IO-320 / Hartzell Prop Strange RPM Behavior (Long) X-Original-Date: Tue, 1 Apr 2003 16:15:06 -0600 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F89C.27071B78" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F89C.27071B78 Content-Type: text/plain Larry: We thought about the cable being the problem... it is pretty taught. It originally was just Adel-clamped to the forward-most pushrod tube! You could move it fore and aft about 1/4"! The A&P fabricated a bracket that is attached to the governor. The business end of the cable is now clamped to that bracket with the proper cable-end clamp. The cable sheath cannot be moved. But I guess it's still possible that the sheath is stretching as the engine torques counter-clockwise (left side down) and as is pulled out and down by the prop load. I can see how there could easily be several 1/10ths of an inch (or more!) of displacement that could have the effect of shortening the control cable. We'll have to take a closer look at that! Re some obstruction in the oil lines, every oil passage in the engine should have been cleaned out when the case was sent out to be inspected for damage from the prop strike. When we got it back it had obviously been through a thorough cleaning. The governor was newly overhauled and the prop was brand new. Seems to me all oil passages should have been wide open. Lee BTW: S'n'F just doesn't fit in my schedule, but I WILL be going to Suffolk! ------_=_NextPart_001_01C2F89C.27071B78 Content-Type: text/html Message

Larry:

We thought about the cable being the problem... it is pretty taught. It originally was just Adel-clamped to the forward-most pushrod tube! You could move it fore and aft about 1/4"! The A&P fabricated a bracket that is attached to the governor. The business end of the cable is now clamped to that bracket with the proper cable-end clamp. The cable sheath cannot be moved. But I guess it's still possible that the sheath is stretching as the engine torques counter-clockwise (left side down) and as is pulled out and down by the prop load. I can see how there could easily be several 1/10ths of an inch (or more!) of displacement that could have the effect of shortening the control cable. We'll have to take a closer look at that!

Re some obstruction in the oil lines, every oil passage in the engine should have been cleaned out when the case was sent out to be inspected for damage from the prop strike. When we got it back it had obviously been through a thorough cleaning. The governor was newly overhauled and the prop was brand new. Seems to me all oil passages should have been wide open.

Lee

BTW: S'n'F just doesn't fit in my schedule, but I WILL be going to Suffolk!

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