Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Wed, 08 Dec 2004 02:23:32 -0500 Message-ID: X-Original-Return-Path: Received: from vineyard.net ([204.17.195.90] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 559874 for lml@lancaironline.net; Wed, 08 Dec 2004 00:37:38 -0500 Received-SPF: none receiver=logan.com; client-ip=204.17.195.90; envelope-from=ted@vineyard.net Received: from localhost (loopback [127.0.0.1]) by vineyard.net (Postfix) with ESMTP id 3FCB691521 for ; Wed, 8 Dec 2004 00:37:08 -0500 (EST) Received: from vineyard.net ([127.0.0.1]) by localhost (king1.vineyard.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 36486-02 for ; Wed, 8 Dec 2004 00:37:08 -0500 (EST) Received: from direct (fsy2.vineyard.net [66.101.65.2]) by vineyard.net (Postfix) with SMTP id 790979151E for ; Wed, 8 Dec 2004 00:37:07 -0500 (EST) X-Original-Message-ID: <001d01c4dce8$1f473420$02416542@direct> From: "Ted Stanley" X-Original-To: "Mail List Lancair" Subject: re: Prop Dynamic Balancing X-Original-Date: Wed, 8 Dec 2004 00:27:00 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Virus-Scanned: by AMaViS-king1 at Vineyard.NET Mike - I suggest you check a couple of items before you jump right into dynamic balancing: 1 - Check the track of the blades. They should track within about 1/16 of an inch. If they don't track try removing the prop, turn it 180 degrees, and remount it. 2 - Check that the blade angles are the same using a propeller protractor. They should match within about two tenths of a degree. This can be done on aircraft or at a prop shop. If you take it to a prop shop ask them to check the static balance. Dynamic balancing cannot cure an aerodynamic imbalance. Since your engine/prop combination was smooth prior to the prop work it seems logical to assume a prop problem or an installation problem. Ted Stanley - A&P-IA