X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4127113 for flyrotary@lancaironline.net; Tue, 16 Feb 2010 15:08:39 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.0 c=1 a=jk7trzKny-QA:10 a=ayC55rCoAAAA:8 a=arxwEM4EAAAA:8 a=QdXCYpuVAAAA:8 a=7g1VtSJxAAAA:8 a=ekHE3smAAAAA:20 a=UretUmmEAAAA:8 a=Ia-xEzejAAAA:8 a=nUuTZ29dAAAA:8 a=OjNCzoMTOKeTOcvc-HsA:9 a=dRPrU_U0wg_yf1Ujc6YA:7 a=_yOwoLM8RNfPvSHfxbhOr1bXhkAA:4 a=5zrLeAV0Z70A:10 a=1vhyWl4Y8LcA:10 a=EzXvWhQp4_cA:10 X-Cloudmark-Score: 0 X-Originating-IP: 75.191.186.236 Received: from [75.191.186.236] ([75.191.186.236:1394] helo=computername) by cdptpa-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id CF/42-04431-42BFA7B4; Tue, 16 Feb 2010 20:08:05 +0000 From: "Ed Anderson" Message-ID: To: "'Rotary motors in aircraft'" Subject: Extra Throttle travel and the Leaf Blower Date: Tue, 16 Feb 2010 15:12:16 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcqvJSyT5JT1oqYVQWOXU6410KhHqAAHYbrQ X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: Dennis, given that you had the manifold pressurized above ambient pressure by using the leaf blower, I would assume that the more throttle you gave and opened up the throttle plate more - you permitted more air flow (now assisted by the leaf blower) into the manifold. Where you airflow had been limited by the ambient air pressure - with the blower you are now operating as if the ambient were a higher pressure. No dead throttle travel could indicate that give the additional flow and resulting higher manifold pressure, that you might could have used a slightly larger TB in this circumstance to permit more air flow and get even higher manifold pressure/density. In other words your current TB size could have become restricting with this higher (blower assisted) air flow, whereas with only unaided atmospheric pressure pushing a lesser air flow through the throttle body it was not restricting. While I WAS joking about putting a leaf blower under the cowl, I do think the results were very interesting. So if Ernest air pump can get up to 1.2" Hg, it looks like he will have a functional and useful system. Whether it provides benefit worth the effort yet remains to be seen. But if Ernest didn't come up with these things, he would be flying before I pass on and he's determined not to do that {:>) Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Dennis Haverlah Sent: Tuesday, February 16, 2010 11:28 AM To: Rotary motors in aircraft Subject: [FlyRotary] Idle Oil Pressure and Extra Throttle travel While performing the blower tests yesterday I checked my idle oil pressure and it was 55 to 65 psi. at 1600 rpm. I have the original oil jets in the engine. I did not notice any appreciable dead area in the throttle travel as I approached the WOT condition. Dennis H. -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com