Return-Path: Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 617983 for flyrotary@lancaironline.net; Sat, 22 Jan 2005 23:01:10 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.71; envelope-from=atlasyts@bellsouth.net Received: from [65.11.37.52] by imf23aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050123040040.LVDY2378.imf23aec.mail.bellsouth.net@[65.11.37.52]> for ; Sat, 22 Jan 2005 23:00:40 -0500 User-Agent: Microsoft-Entourage/10.1.4.030702.0 Date: Sat, 22 Jan 2005 23:00:38 -0500 Subject: Re: [FlyRotary] Re: Fuel Injector Sizing From: Bulent Aliev To: Rotary motors in aircraft Message-ID: In-Reply-To: Mime-version: 1.0 Content-type: multipart/alternative; boundary="B_3189279642_56119" > This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --B_3189279642_56119 Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit On 1/22/05 9:10 AM, "Ed Anderson" wrote: > You certainly could be right about that, Rusty. My understanding was to > expect the fuel pressure to vary to compensate for the different manifold > pressure. But, there is no indication on my gauge and this is the second > pressure regulator (but, of the same make Hmmm) that I have had. It does > regulate (else my fuel pressure would be much higher) but apparently does not > compensate for manifold pressure based on what I am hearing. > > But, as you indicated, If there is any operational problem associated with > it, I have not encountered it (or recognized it as such). It is one of the > smaller ones and it could be that it is dumping all the fuel it can at 40-43 > psi and there is not sufficient return flow capacity to compensate for the > variations in manifold pressure. I suspect that if I had a turbo where the > manifold pressure varied considerably that the lack of such compensation might > be more detrimental to engine performance (and life). Just speculation of > course. > > Ed A >> Hi Ed, I just came from the hangar. My FP is set at 37psi without the engine running. I noticed at 2300 rpm the FP was around 20 psi. So it varies with the MP. Bulent --B_3189279642_56119 Content-type: text/html; charset="US-ASCII" Content-transfer-encoding: quoted-printable Re: [FlyRotary] Re: Fuel Injector Sizing On 1/22/05 9:10 AM, &qu= ot;Ed Anderson" <eanderson@carolina.rr.com> wrote:

You certainly could be right about that, Rusty.  My understanding was = to expect the fuel pressure to vary to compensate for the different manifold= pressure.  But, there is no indication on my gauge and this is the sec= ond pressure regulator (but, of the same make Hmmm) that I have had.  I= t does regulate (else my fuel pressure would be much higher) but apparently = does not compensate for manifold pressure based on what I am hearing.
 But, as you indicated, If there is any ope= rational problem associated with it, I have not encountered it (or recognize= d it as such).  It is one of the smaller ones and it could be that it i= s dumping all the fuel it can at 40-43 psi and there is not sufficient retur= n flow capacity to compensate for the variations in manifold pressure.  = ;I suspect that if I had a turbo where the manifold pressure varied consider= ably that the lack of such compensation might be more detrimental to engine = performance (and life).   Just speculation of course.
Ed A

Hi Ed, I just came from the hangar. My FP is set at 37psi w= ithout the engine running. I noticed at 2300 rpm the FP was around 20 psi. S= o it varies with the MP.
Bulent --B_3189279642_56119--