X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTP id 4990152 for flyrotary@lancaironline.net; Fri, 20 May 2011 21:52:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.122; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=aeMH4JcVOnVr0LmJAzqEvfnmJyuaZufWdlng4HTRGCk= c=1 sm=0 a=881XVMCX0jsA:10 a=8nJEP1OIZ-IA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=ayC55rCoAAAA:8 a=Ia-xEzejAAAA:8 a=pjdaNNIBAAAA:8 a=7g1VtSJxAAAA:8 a=NlECmjTiDqhbpY8H0x8A:9 a=iC844tUKZ_5eaLmOS2kA:7 a=wPNLvfGTeEIA:10 a=Qa1je4BO31QA:10 a=EzXvWhQp4_cA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:51813] helo=EdPC) by cdptpa-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id CC/94-03893-2AA17DD4; Sat, 21 May 2011 01:51:30 +0000 Message-ID: <483A5A9BB71A448C8FC47A862D4C83F0@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Blower experiment: FAIL Date: Fri, 20 May 2011 21:51:16 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 How about that! Must say I'm surprised to see impeller for that size engine on ebay! You just never know what you will find on the net Ed -------------------------------------------------- From: "Ernest Christley" Sent: Friday, May 20, 2011 8:30 PM To: "Rotary motors in aircraft" Subject: [FlyRotary] Re: Blower experiment: FAIL > On 05/20/2011 07:27 PM, Ed Anderson wrote: >> Mike, general centrifugal impeller such as used in turbocharger and some >> superchargers are rev up to much higher rpm than the engine operates at. >> Ernest concept involved using the engine rpm (direct drive so to speak) >> which is much lower than the rpm these centrifugal impellers require (for >> any useful pressure increase). So slower rpm generally means larger >> impellers than commonly found in turbo or superchargers. If not >> constrained to the engine rpm then yes, your suggestion would have >> merit - on the other hand, there may be impeller off superchargers of >> those big multirow radial engines of WWII that would be large enough - >> probably hard to find and heavy. > Not so hard to find: > http://cgi.ebay.com/PRATT-WHITNEY-RADIAL-ENGINE-IMPELLER-/320701148172?pt=LH_DefaultDomain_0&hash=item4aab472c0c > > http://cgi.ebay.com/PRATT-WHITNEY-RADIAL-ENGINE-IMPELLER-/320701149501?pt=LH_DefaultDomain_0&hash=item4aab47313d > > and I also found this: > > http://cgi.ebay.com/TROY-BILT-TB4BP-BACKPACK-BLOWER-IMPELLER-FAN-753-05657-/270718363966?_trksid=p3286.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D3%26po%3DLVI%26ps%3D63%26clkid%3D71785288103015489 > > The problem is with cutting the most of the center out. Then it is just > cantilevered blades stick up. > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >