X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.123] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3688155 for flyrotary@lancaironline.net; Fri, 19 Jun 2009 09:24:10 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.123; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta04.mail.rr.com with ESMTP id <20090619132331517.CMEV4077@cdptpa-omta04.mail.rr.com> for ; Fri, 19 Jun 2009 13:23:31 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: 295cc vs 495 cc was [FlyRotary] responses to responses, not developing full power Date: Fri, 19 Jun 2009 09:23:31 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01C9F0BF.9D311870" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: Thread-Index: Acnw4Fz6Ws1PMUzgRl641KAtArtBSgAAGY6Q X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20090619132331517.CMEV4077@cdptpa-omta04.mail.rr.com> This is a multi-part message in MIME format. ------=_NextPart_000_000F_01C9F0BF.9D311870 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Good point, Al. Since I fly with same size injectors in primary and secondary, I've never had the need to use mode 6 and it doesn't come to mind when discussing different size injectors. Thanks, I'm going to have to embed that a bit more firmly in the brain. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Friday, June 19, 2009 10:17 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 295cc vs 495 cc was [FlyRotary] responses to responses, not developing full power When you switch the primary injectors off and secondary injectors on - the EC2 is still providing the same pulse duration (assuming engine manifold pressure, etc are the same) for the almost twice as large secondary injectors as it did for the smaller primary injectors. Ergo, you are feeding the engine almost twice the fuel (for the same engine conditions) as you did when on the primary injectors. The engine is choking on too much fuel. Unless, of course, you have made the mode 6 adjustment to compensate for the difference in the flow rates - or will mode 6 not handle such a big differential. Al G __________ 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_000F_01C9F0BF.9D311870 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Good point, = Al.

 

Since I fly with same size = injectors in primary and secondary, I’ve never had the need to use mode 6 and = it doesn’t come to mind when discussing different size injectors.  Thanks, = I’m going to have to embed that a bit more firmly in the = brain.

 

Ed

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Friday, June 19, = 2009 10:17 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = 295cc vs 495 cc was [FlyRotary] responses to responses, not developing full = power

 

When you switch the primary injectors off and = secondary

injectors on - the EC2 is still providing the same pulse duration = (assuming

engine manifold pressure, etc are the same) for the almost twice as = large

secondary injectors as it did for the smaller primary injectors. Ergo, = you

are feeding the engine almost twice the fuel (for the same = engine

conditions) as you did when on the primary injectors.  The engine is = choking

on too much fuel. 

 <= /font>

Unless, of = course, you have made the mode 6 adjustment to compensate for the difference in the = flow rates – or will mode 6 not handle such a big = differential.

 <= /font>

Al = G



__________ 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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