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 5.3.10) with ESMTP id 4556631 for flyrotary@lancaironline.net; Fri, 05 Nov 2010 12:23:32 -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=uESSSoDEku2quKX/oFXS2Smn5+55LTFcWFr5T5T8nFs= c=1 sm=0 a=3y78ZV0di6kA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=Ia-xEzejAAAA:8 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=41R5M_rj8eb1hp7A1HkA:9 a=cs_-aK6ao7DfVhB5WG0A:7 a=canB4hWjZZbSBQlBUDy-sYnozToA:4 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=k81OCXX-4Ez4iNbH:21 a=-AMf8LxcI41R4Ulr:21 a=yMhMjlubAAAA:8 a=E93lBu2AAAAA:8 a=WFunCVpHP79Jg0zHaI8A:9 a=xPOuS_LtabsPgc7TNzAA:7 a=Tz4j6Jxk9LbTt4eDqddjrAfiRMoA: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] ([174.110.167.5:64266] helo=EdPC) by cdptpa-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 15/79-07087-F5F24DC4; Fri, 05 Nov 2010 16:22:56 +0000 Message-ID: From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Fuel Useage error? Date: Fri, 5 Nov 2010 12:22:39 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01CB7CE4.235B12F0" 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_0016_01CB7CE4.235B12F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I certainly agree, Steve. It just shows that error's can exits but = certain operating conditions may hide or camouflage their magnitude. Ed From: Steven W. Boese=20 Sent: Friday, November 05, 2010 11:58 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Fuel Useage error? Ed, =20 The default staging threshold of my EC2's that were updated in February = of this year is a value of 21 which corresponds to a staging MAP of = 20.5" Hg. This is in a region where it is more likely to encounter the = fuel flow error than the staging MAP of 15" Hg that you are using. It = seems to me that it is useful to know that the error exists and to be = aware of the conditions where it might become a problem. =20 It is my intention to conduct flight testing specifically designed to = further verify the magnitude of the error. It would be nice if I found = that no error exists, but that seems very unlikely. =20 Steve =20 =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On = Behalf Of Ed Anderson Sent: Friday, November 05, 2010 9:23 AM To: Rotary motors in aircraft Subject: [FlyRotary] Fuel Useage error? =20 Ok, Steve, =20 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. =20 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 =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. =20 So that could explain why I am apparently not seeing the difference you = data indicates =20 Ed=20 =20 =20 =20 =20 =20 Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com ------=_NextPart_000_0016_01CB7CE4.235B12F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I certainly agree, Steve.  It just shows = that error's=20 can exits but certain operating conditions may hide or camouflage their=20 magnitude.
 
Ed

Sent: Friday, November 05, 2010 11:58 AM
Subject: [FlyRotary] Re: Fuel Useage = error?

Ed,

 

The=20 default staging threshold of my EC2=92s that were updated in February of = this year=20 is a value of 21 which corresponds to a staging MAP of 20.5=94 Hg.  = This is=20 in a region where it is more likely to encounter the fuel flow error = than the=20 staging MAP of 15=94 Hg that you are using.  It seems to me that it = is useful=20 to know that the error exists and to be aware of the conditions where it = might=20 become a problem.

 

It=20 is my intention to conduct flight testing specifically designed to = further=20 verify the magnitude of the error.  It would be nice if I found = that no=20 error exists, but that seems very unlikely.

 

Steve

 

 

From: Rotary = motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Friday, November 05, 2010 9:23 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Fuel Useage=20 error?

 

Ok,=20 Steve,

 

I = think that=20 answer my question to you about why my total fuel consumption measure by = my PW=20 integration system did not seem to reflect the magnitude of the errors = we had=20 discussed.

 

Since I=20 seldom (if ever - except during taxi/landing) operate near or below my = staging=20 point in flight - and  I do not appear to be getting (at least the=20 magnitude) error when I compare my instruments "Fuel Used" amount with = what I=20 measure when I fill up the tanks.   My manifold pressure in = flight=20 rarely drops below 20-22 " hg. 

 

One reason is=20 I generally run with my throttle wide open to reduce pumping loses and I = tweak=20 the mixture to keep it running smoothly - so my staging point (around = 15" Hg) is=20 only seen on the ground and while in the landing pattern.  Since I = spend=20 very little time in those regimes, I am seldom near or below my staging=20 point.

 

So that could=20 explain why I am apparently not seeing the difference you data=20 indicates

 

Ed 

 

 

 

 

 

Edward L.=20 Anderson
Anderson Electronic Enterprises LLC
305 Reefton=20 Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com=

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