X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from relais.videotron.ca ([24.201.245.36] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1311044 for flyrotary@lancaironline.net; Sun, 06 Aug 2006 16:58:34 -0400 Received-SPF: none receiver=logan.com; client-ip=24.201.245.36; envelope-from=geryvon@videotron.ca Received: from AMDSEMPRON2400 ([74.56.149.208]) by VL-MO-MR001.ip.videotron.ca (Sun Java System Messaging Server 6.2-2.05 (built Apr 28 2005)) with SMTP id <0J3L000HEGW60Q60@VL-MO-MR001.ip.videotron.ca> for flyrotary@lancaironline.net; Sun, 06 Aug 2006 16:57:44 -0400 (EDT) Date: Sun, 06 Aug 2006 16:56:52 -0400 From: Yvon Cournoyer Subject: PROPELLERS AND COOLING THE ROTARY To: Alain Cournoyer , Rotary motors in aircraft , ACRE , warpdrive@gnt.net Reply-to: Yvon Cournoyer Message-id: <001101c6b99a$f4a00df0$6500a8c0@AMDSEMPRON2400> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Mailer: Microsoft Outlook Express 6.00.2900.2869 Content-type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original Content-transfer-encoding: 7BIT X-Priority: 3 X-MSMail-priority: Normal I have replaced my old wood 2 blades 74'' propeller with a new 3 blades 72'' Warp Drive, ground adjustable. I have set the pitch to obtain about 4800 engine static rpm, which is what I began flying with my old wood prop, some years ago. No other changes, yet in spite of abnormally hot and humid weather, I find that both oil and coolant cool better and will allow longer full power static runups. I have not flown the new prop yet, but I am eager to verify its performance at altitude. Yvon.