X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4499005 for flyrotary@lancaironline.net; Fri, 08 Oct 2010 19:06:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=lu/RhtYP0ChAeUxMEPBris12a71TWT5f9yvo3GNwP9w= c=1 sm=0 a=zkHWLAH-CXoA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=hZWWvw5yAAAA:8 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=E4QJ5N9mkEbIqRt1M3gA:9 a=nLmB75DmI46bih_ct-AA:7 a=MpSmOG9lD_Q2hoDFaROx6c8dMAsA:4 a=pILNOxqGKmIA:10 a=E93lBu2AAAAA:8 a=j5UpO_BR5151xwsF1GgA:9 a=k6SJtxh38PnBVO-erGwA:7 a=xRAOY0LWFA6oNXtfyPdIO2CsriYA:4 a=hO30gm18fF0A:10 a=MpuOTR30KwMA:10 a=FOUTPhXFUAcA:10 a=zgjei8Deq7QA:10 a=NWVoK91CQyQA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:58639] helo=EdPC) by cdptpa-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 7A/00-14228-0F3AFAC4; Fri, 08 Oct 2010 23:06:24 +0000 Message-ID: <7B3AE9597A35466EB278F92D82E0976A@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: Another Prop Performance Calculator Date: Fri, 8 Oct 2010 19:06:16 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005D_01CB671B.E20B7250" 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 This is a multi-part message in MIME format. ------=_NextPart_000_005D_01CB671B.E20B7250 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Here is a link to a STATIC performance calculator that seems to at least = give reasonable results http://personal.osi.hu/fuzesisz/strc_eng/index.htm I could turn 5800 rpm static when my prop was 76x88 which this = calculator indicates the engine was producing 168.1 HP to turn the prop = 2035 rpm When I trimmed the prop back to 74x88 I picked up 200 static engine rpm = which this calculator then indicated the engine was producing167.2 HP to = turn the prop 2105 rpm So between 165 and 170 HP seems reasonable. Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com ------=_NextPart_000_005D_01CB671B.E20B7250 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Here is a link to a STATIC performance = calculator that=20 seems to at least give reasonable results
 
http://person= al.osi.hu/fuzesisz/strc_eng/index.htm
 
I could turn 5800 rpm static when my prop was = 76x88 which=20 this calculator indicates the engine was producing 168.1 HP to turn the = prop=20 2035 rpm
 
When I trimmed the prop back to 74x88 I picked = up 200=20 static  engine rpm which this calculator then indicated the engine = was=20 producing167.2 HP to turn the prop 2105 rpm
 
So between 165 and 170 HP seems = reasonable.
 
 
 
Edward L. Anderson
Anderson Electronic = Enterprises=20 LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com
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