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 5.3.10) with ESMTP id 4556558 for flyrotary@lancaironline.net; Fri, 05 Nov 2010 11:23:22 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=Inhw+Jdt7z1D3BivGPfn2aw54OvUEJw5lAn/booRZkE= c=1 sm=0 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=B4X5Q-UYXKWEmcI8dxkA:9 a=IvLjw-Fx-xmt1PyPuTikrlKRzJwA:4 a=pILNOxqGKmIA:10 a=E93lBu2AAAAA:8 a=grauKS1ODPo47q7vKKwA:9 a=sSqx7qkM93-ZLCONR5UA:7 a=bEv_WjVJ1tBpBdG6jsLV8oKBylcA: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] ([174.110.167.5:62926] helo=EdPC) by cdptpa-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 2E/CA-13137-64124DC4; Fri, 05 Nov 2010 15:22:46 +0000 Message-ID: <383FC8913A9049848FF15681D28605A8@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: Fuel Useage error? Date: Fri, 5 Nov 2010 11:22:30 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0039_01CB7CDB.BBEC78F0" 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_0039_01CB7CDB.BBEC78F0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Ok, Steve, I think that answer my question to you about why my total fuel = consumption measure by my PW integration system did not seem to reflect = the magnitude of the errors we had discussed. Since I seldom (if ever - except during taxi/landing) operate near or = below my staging point in flight - and I do not appear to be getting = (at least the magnitude) error when I compare my instruments "Fuel Used" = amount with what I measure when I fill up the tanks. My manifold = pressure in flight rarely drops below 20-22 " hg. =20 One reason is I generally run with my throttle wide open to reduce = pumping loses and I tweak the mixture to keep it running smoothly - so = my staging point (around 15" Hg) is only seen on the ground and while in = the landing pattern. Since I spend very little time in those regimes, I = am seldom near or below my staging point. So that could explain why I am apparently not seeing the difference you = data indicates Ed=20 Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com ------=_NextPart_000_0039_01CB7CDB.BBEC78F0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Ok, Steve,
 
I think that answer my question to you about why = my total=20 fuel consumption measure by my PW integration system did not seem to = reflect the=20 magnitude of the errors we had discussed.
 
Since I seldom (if ever - except during = taxi/landing)=20 operate near or below my staging point in flight - and  I do not = appear to=20 be getting (at least the magnitude) error when I compare my instruments = "Fuel=20 Used" amount with what I measure when I fill up the tanks.   = My=20 manifold pressure in flight rarely drops below 20-22 " hg.  =
 
One reason is I generally run with my throttle = wide open=20 to reduce pumping loses and I tweak the mixture to keep it running = smoothly - so=20 my staging point (around 15" Hg) is only seen on the ground and while in = the=20 landing pattern.  Since I spend very little time in those regimes, = I am=20 seldom near or below my staging point.
 
So that could explain why I am apparently not = seeing the=20 difference you data indicates
 
Ed 
 
 
 
 
 
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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