Return-Path: Received: from [69.12.117.4] (HELO mail-da-1.dns-solutions.net) by logan.com (CommuniGate Pro SMTP 4.1b8) with SMTP id 2436373 for flyrotary@lancaironline.net; Thu, 19 Jun 2003 20:28:36 -0400 Received: (qmail 9869 invoked from network); 20 Jun 2003 00:28:31 -0000 Received: from unknown (HELO STATION4) (kathy@atkinsrotary.com@65.101.155.140) by mail-da-1.dns-solutions.net - 65.101.155.140 with SMTP; 20 Jun 2003 00:28:31 -0000 From: "kathy" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Ivo Magnum Pitch Question Date: Thu, 19 Jun 2003 17:30:28 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit 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 V6.00.2800.1106 I have been using a three blade IVO Magnum for several years now, and have been very happy with it. At 5250rpm on 2.17:1 drive I cruise at 160kts, static run up at that pitch is about 4400rpm...DBA -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Tommy James Sent: Thursday, June 19, 2003 11:19 AM To: Rotary motors in aircraft Subject: [FlyRotary] Ivo Magnum Pitch Question Okay, here is a real test of this groups aeronautical acumen. On the front of my Glastar is a ground adjustable Ivo Magnum (3 blade). The "destructions" advise that it is adjustable from 30" to 90" pitch by turning a large adjustment screw which twists a cam in each blade. This screw has 5 turns stop to stop, or 12" per full turn of the screw. The prop is currently set at ~54" of pitch. I ran the engine this morning to ~4500rpm and 25" MAP. While there was throttle left, the engine did not seem to want to advance from there. The plane was bouncing around like a caged animal... This is new ( and exciting) to someone used to C152s. The test: How would one determine the correct pitch for first flight and what is the guesstimate of what that pitch should be? Regards, Tommy James<>< ps. no further starter problem >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html