Return-Path: Received: from imo-m16.mx.aol.com ([64.12.138.206] verified) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP id 742135 for flyrotary@lancaironline.net; Wed, 16 Feb 2005 18:52:05 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.206; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m16.mx.aol.com (mail_out_v37_r3.8.) id q.77.3f4743c7 (15899) for ; Wed, 16 Feb 2005 18:51:17 -0500 (EST) Received: from aol.com (mow-d18.webmail.aol.com [205.188.139.134]) by air-id09.mx.aol.com (v104.18) with ESMTP id MAILINID92-3e1b4213dc7592; Wed, 16 Feb 2005 18:51:17 -0500 Date: Wed, 16 Feb 2005 18:51:17 -0500 From: WRJJRS@aol.com To: flyrotary@lancaironline.net ("Rotary motors in aircraft") Subject: Re: [FlyRotary] I found the power MIME-Version: 1.0 Message-ID: <6C0EAF56.484DC8BF.00051B7E@aol.com> X-Mailer: Atlas Mailer 2.0 X-AOL-IP: 66.127.99.234 X-AOL-Language: english Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit I restarted and taxiied away from the hangar a bit so as to not be as loud for others in and near the hangar and did a full power runup. I hit 5600 static rpm's. In the past, the best I could hope for was 5200 Paul, if you get that much of a change by just installing the cowl it is probably not the heat. I would make sure you aren't restricting the intake. This is far moer likely to cause a instant RPM drop. Be sure that there is enough room for the air to pass! If not cut a hole in the cowl and put a periscope scoop on the thing. You may even get some ram at speed improving the performance. IT IS THE SIMPLE THINGS THAT ALWAYS BITE YOU. Good Luck. Bill Jepson