Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 617309 for flyrotary@lancaironline.net; Sat, 22 Jan 2005 07:40:27 -0500 Received-SPF: none receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.rr.com [24.74.185.127]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j0MCdrkd023898 for ; Sat, 22 Jan 2005 07:39:54 -0500 (EST) Message-ID: <000701c5007f$c631db90$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fuel Injector Sizing Date: Sat, 22 Jan 2005 07:42:03 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C50055.DD250C20" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C50055.DD250C20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: Fuel Injector SizingHi Buly, Actually, I have a manifold referenced pressure regulator (which if I = understand the concept) attempts to keep the pressure differential = between the fuel side and manifold side of the injector constant. = However, Varying engine manifold pressure (varying throttle opening) = does not appear to have any affect on my fuel pressure. It sits rock = steady at 40 psi with one pump and goes up to 43 psi with both running = regardless of throttle position. I would expect that as manifold = pressure rises from opening the throttle that the fuel pressure would = rise to keep the pressure differential constant - but, if that is indeed = happening, I can not detect it. Ed A ----- Original Message -----=20 From: Bulent Aliev=20 To: Rotary motors in aircraft=20 Sent: Friday, January 21, 2005 7:57 PM Subject: [FlyRotary] Re: Fuel Injector Sizing On 1/21/05 6:37 PM, "Ed Anderson" wrote: George, my fuel pressure gauge reads between 40 and 43 psi depending = on whether I have one or both pumps on. I fly with 40 psi (one pump). = My pump (with no flow) will give a pressure of 80 psi, but a regulator = keeps it at 40-43 psi. I generally check my pumps for their no-flow = pressure and have noticed over the 6 years that the pressure of the main = pump has decreased from 80 psi to 60 psi - so getting near replacement = time. The spare pump still produces 80 psi - less wear as it is = normally only on for take off and landing. Ed A Hi Ed, do you set your fuel pressure without the engine running or = with? The MAP varies the FP while running, so I Assume 37 psi without = engine running would be the benchmark? Buly ------=_NextPart_000_0004_01C50055.DD250C20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: Fuel Injector Sizing
Hi Buly,
 
Actually, I have a manifold referenced = pressure=20 regulator (which if I understand the concept) attempts to keep the = pressure=20 differential between the fuel side and manifold side of the injector=20 constant. However, Varying engine manifold pressure (varying = throttle=20 opening) does not appear to have any affect on my fuel pressure.  = It sits=20 rock steady at 40 psi with one pump and goes up to 43 psi with both = running=20 regardless of throttle position.  I would expect that as manifold = pressure=20 rises from opening the throttle that the fuel pressure would rise to = keep the=20 pressure differential constant - but, if that is indeed happening, I can = not=20 detect it.
 
Ed A
 
 
----- Original Message -----
From:=20 Bulent=20 Aliev
Sent: Friday, January 21, 2005 = 7:57=20 PM
Subject: [FlyRotary] Re: Fuel = Injector=20 Sizing

On = 1/21/05=20 6:37 PM, "Ed Anderson" <eanderson@carolina.rr.com&g= t;=20 wrote:
George, = my fuel=20 pressure gauge reads between 40 and 43 psi depending on whether I = have one=20 or both pumps on.  I fly with 40 psi (one pump).   My = pump=20 (with no flow) will give a pressure of 80 psi, but a regulator keeps = it at=20 40-43 psi.  I generally check my pumps for their no-flow = pressure and=20 have noticed over the 6 years that the pressure of the main pump has = decreased from 80 psi to 60 psi - so getting near replacement time.=20  The spare pump still produces 80 psi - less wear as it is = normally=20 only on for take off and landing.

Ed=20 A

Hi Ed, do you set your fuel pressure without the = engine=20 running or with? The MAP varies the FP while running, so I Assume 37 = psi=20 without engine  running would be the = benchmark?
Buly=20 ------=_NextPart_000_0004_01C50055.DD250C20--