Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 29 Jul 2003 09:52:48 -0400 Message-ID: X-Original-Return-Path: Received: from ms-smtp-01.texas.rr.com ([24.93.36.229] verified) by logan.com (CommuniGate Pro SMTP 4.1) with ESMTP id 2506088 for lml@lancaironline.net; Tue, 29 Jul 2003 07:29:38 -0400 Received: from oemcomputer (cpe-67-10-125-138.gt.rr.com [67.10.125.138]) by ms-smtp-01.texas.rr.com (8.12.5/8.12.2) with SMTP id h6TBTTxI027740 for ; Tue, 29 Jul 2003 06:29:37 -0500 (CDT) X-Original-Message-ID: <010d01c355d3$b5a5aca0$8a7d0a43@gt.rr.com> From: "Greg Nelson" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: mt questions X-Original-Date: Tue, 29 Jul 2003 06:17:00 -0700 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 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Bob: I use an IVOPROP 3-blade that is highly-pitched (HP) to 105 inches helical travel. It doesn't use a hydraulic governor and instead uses slip rings similar to those developed for electric propeller deicing. The rings are located on the starter ring to supply electricity to a motor located in front of the propeller and within the nosecone. Previously I wrongly reported that the harmonic dampener was located on the starter ring when in fact it is not (I often say this because it makes explanation easier,... sorry!). The dampener is located on the prop flange immediately behind the prop and I use six inch long, 1/2 inch thick bolts to secure it, the prop and electric motor to the flange. The dampener is a 17 lb precisely machined piece of soft steel and it adds a considerable amount of inertial throw to the prop which is an aid in starting. I believe too that the dampener is the reason why I have had success using the IVOPROP when others using 4 cyl engines have experienced trouble with vibration and prop loosening as indicated by a metal test tape (stress) that bridges between the three props. In fact, Ivo is now reluctant to apply the IVOPROP to 4 cyl engines.