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 5.2c1) with ESMTP id 2441409 for flyrotary@lancaironline.net; Wed, 31 Oct 2007 08:34:47 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([24.74.103.61]) by cdptpa-omta02.mail.rr.com with SMTP id <20071031123408.YOEW8967.cdptpa-omta02.mail.rr.com@edward2> for ; Wed, 31 Oct 2007 12:34:08 +0000 Message-ID: <005201c81bba$5c2f7460$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Rotary Cross Country Report Date: Wed, 31 Oct 2007 08:34:20 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 Hi Finn Well, increased manifold pressure (unless you are using a manifold referenced fuel pressure regulator) due to turbo charging could theoretically reduce the amount of fuel injected by a small amount. But, as you said, the amount would be small due to the small pressure differential compared to the fuel pressure. In any case, David has the right kind of fuel pressure regulator, so probably not a factor. Its not so much that there is a difference, what bothers me more is the wide range. Now, its possible that if you have air in the fuel tanks or full it on a sloping hill, etc, that you could end up with less than a full tank even though the fuel is pouring out the filler cap. That can induce errors or a random nature. Can't think of anything else at the moment. By the way, how is progress on the Shady Bend house/hangar coming along? Ed ----- Original Message ----- From: "Finn Lassen" To: "Rotary motors in aircraft" Sent: Tuesday, October 30, 2007 10:23 PM Subject: [FlyRotary] Re: Rotary Cross Country Report > Ed, is there any possible way that the injectors can be made to flow more > or less fuel due to turbo charging? > But I guess any "back pressure" from the turbocharged air would be > insignificant compared to the fuel pressure... > > Finn > > Ed Anderson wrote: >> Hi Dave, glad you made it. Yes, really made it a gloomy week on my end >> thinking about all the fun all you folks were having while I kept pulling >> the curtains back looking at the ceiling {:>) >> Thanks for the data, I'll look into the fuel calibration procedure >> again. I would normally expect it to settle down by now. Tell me once >> again the flow rate of your primary and secondary injectors, then I'll go >> back and look to see if I perhaps screwed up the calculation. I would >> normally expect to see the error being less than 0.5 gallons out of a 37 >> gallon tank of fuel. Naturally, the process depends on accuracy in >> measuring input, but most tank pumps are pretty good. More importantly, >> I would expect it to stabilize, so need to look into it. >> It looks like an average of about 2.35 gallons per fill-up ranging from >> an error of 3.8 gallons to 0.8 gallons and I know we can do better than >> that. >> Ed >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >