X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.netapp.com ([216.240.18.37] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5023941 for flyrotary@lancaironline.net; Fri, 17 Jun 2011 16:31:36 -0400 Received-SPF: softfail receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@nc.rr.com X-IronPort-AV: E=Sophos;i="4.65,383,1304319600"; d="scan'208";a="556480530" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 17 Jun 2011 13:31:01 -0700 Received: from [10.62.16.155] (jorma-lxp.hq.netapp.com [10.62.16.155] (may be forged)) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id p5HKV0m8010191 for ; Fri, 17 Jun 2011 13:31:01 -0700 (PDT) Message-ID: <4DFBB981.5050205@nc.rr.com> Date: Fri, 17 Jun 2011 16:30:57 -0400 From: Ernest Christley Reply-To: echristley@nc.rr.com User-Agent: Thunderbird 2.0.0.24 (X11/20100623) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Blower does work References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Tracy wrote: > Where is the pressure being measured? > > Very strange if this is a graph of your actual Manifold Pressure. Is it? I can't think of any scenario where the manifold pressure would remain almost constant from 1000 to 5500 rpm unless the prop presented almost no load to the engine. Even assuming that, I can't see why the MAP should be higher with the blower on. > The video that I linked to last night...notice how the airplane didn't move?...very little load. Best it could do was blow over the fan I had setup for the cooiling intake. My big goal for the weekend is to get more pitch into this prop so that I have something resembling a load. Why wouldn't you expect the map to go up when you have a blower pressurizing it?