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 5.2.9) with ESMTP id 3232702 for flyrotary@lancaironline.net; Tue, 21 Oct 2008 13:10:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta06.mail.rr.com with ESMTP id <20081021171005.PJEH18245.cdptpa-omta06.mail.rr.com@computername> for ; Tue, 21 Oct 2008 17:10:05 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Water in Fuel?? (or another adventure in the aviation events of Ed Anderson) Date: Tue, 21 Oct 2008 13:10:12 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0026_01C9337E.5A429A60" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AckzN0iKt5VxKDb6RrqC2vl+SVVnLAAaA77g X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: Message-Id: <20081021171005.PJEH18245.cdptpa-omta06.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_0026_01C9337E.5A429A60 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I agree, Al. More than likely it was the plugs telling me they were in need of change. I used auto gas exclusively in the fist year of flying with no problem and it was not until I had a fire incident pouring in auto fuel from a container that I decided to primarily use 100LL - for safety reasons. Well, that plus the fact there was very seldom auto fuel available at an airport away from home. The only two down sides I have found using 100LL is the cost and the lead fouling of spark plugs. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Tuesday, October 21, 2008 1:43 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Water in Fuel?? (or another adventure in the aviation events of Ed Anderson) John, I think your analysis makes lots of sense for a gravity fed fuel system (i.e. no pumps). However, I would think that the EFI pumps would churn the water and fuel together pretty thoroughly. Yes the pump will mix it up pretty well; but it will separate out again in the line.. In any case, I did use some auto gas back a couple of flights ago and did not like it. The engine had a bit of a miss - nothing bad, but just noticeable - could have been the plugs needing a change to be fair It seems to me this is unlikely an effect of using mogas. Running my engine on the dyno showed a very slight improvement in performance with 87 octane mogas over 100LL. I think the theory was faster propagation of the flame front in the odd-shaped combustion chamber. And as you know, the lead is no friend to the spark plugs. Al __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_0026_01C9337E.5A429A60 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I agree, Al.  More than likely = it was the plugs telling me they were in need of change. =

 

 I used auto gas exclusively = in the fist year of flying with no problem and it was not until I had a fire = incident pouring in auto fuel from a container that I decided to primarily use = 100LL - for safety reasons.  Well, that plus the fact there was very seldom = auto fuel available at an airport away from home.  The only two down = sides I have found using 100LL is the cost and the lead fouling of spark = plugs.

 

Ed

 

Ed Anderson

Rv-6A N494BW Rotary = Powered

Matthews, NC

eanderson@carolina.rr.com=

http://www.andersonee.com

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.dmack.net/mazda/index.html<= font size=3D2 face=3DArial>

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Tuesday, October = 21, 2008 1:43 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Water in Fuel?? (or another adventure in the aviation events of Ed = Anderson)

 

John, I think = your analysis makes lots of sense for a gravity fed fuel system (i.e. no pumps).  However, I would think that the EFI pumps would churn the = water and fuel together pretty thoroughly. 

Yes the pump will mix it up = pretty well; but it will separate out again in the line..

 

In any case, I = did use some auto gas back a couple of flights ago and did not like it.  = The engine had a bit of a miss – nothing bad, but just noticeable = – could have been the plugs needing a change to be = fair

It seems to me this is unlikely = an effect of using mogas.  Running my engine on the dyno showed a very = slight improvement in performance with 87 octane mogas over 100LL.  I = think the theory was faster propagation of the flame front in the odd-shaped = combustion chamber.  And as you know, the lead is no friend to the spark = plugs.

 

Al

 



__________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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