X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1414004 for flyrotary@lancaironline.net; Thu, 21 Sep 2006 18:28:24 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-100-038.carolina.res.rr.com [24.74.100.38]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id k8LKPXkH005324 for ; Thu, 21 Sep 2006 16:25:35 -0400 (EDT) Message-ID: <001301c6ddbc$407d4720$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fuel Pressure Regulator Vacuum or Boost?? Date: Thu, 21 Sep 2006 16:26:42 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C6DD9A.B92687D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0010_01C6DD9A.B92687D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks, Bill, for confirming my suspicion. The 9 year old regulator I = am using was purchased because it had a manifold reference line and was = listed as a regulator for boost. I assumed (wrongly it appears) that = because it was referenced to the manifold that it would adjust fuel = pressure for manifold "vacuum" as well as positive boost. =20 After noting that some pressure regulators were for "Boost" and others = for "Vacuum/Boost" I came to suspect that the difference was not just = semantics in advertising. But, wanted someone who realllllyyyy knew to = put me straight. Ed ----- Original Message -----=20 From: wrjjrs@aol.com=20 To: Rotary motors in aircraft=20 Sent: Thursday, September 21, 2006 3:42 PM Subject: [FlyRotary] Re: Fuel Pressure Regulator Vacuum or Boost?? Ed, You are correct, the "boost reference" is only changed at more than 1 = atmosphere. The usually more expensive vacuum and boost referenced unit = would lower the pressure at idle. Bill Jepson=20 =20 -----Original Message----- From: joeh@pilgrimtech.com To: flyrotary@lancaironline.net Sent: Thu, 21 Sep 2006 11:48 AM Subject: [FlyRotary] Re: Fuel Pressure Regulator Vacuum or Boost?? I presume your pressure gauge remains steady as you adjust throttle ? Yep, no real change in FP over the entire range from idle to WOT. Joe Hull Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)=20 Redmond (Seattle), Washington -------------------------------------------------------------------------= ----- Check out the new AOL. Most comprehensive set of free safety and = security tools, free access to millions of high-quality videos from = across the web, free AOL Mail and more. ------=_NextPart_000_0010_01C6DD9A.B92687D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks, Bill, for confirming my = suspicion. =20 The 9 year old regulator I am using was purchased because it had a = manifold=20 reference line  and was listed as a regulator for boost.  I = assumed=20 (wrongly it appears) that because it was referenced to the manifold that = it=20 would adjust fuel pressure for manifold "vacuum" as well as positive=20 boost. 
 
After noting that some pressure = regulators were for=20 "Boost" and others for "Vacuum/Boost" I came to suspect that the = difference was=20 not just semantics in advertising.  But, wanted someone who = realllllyyyy=20 knew to put me straight.
 
Ed
----- Original Message -----
From:=20 wrjjrs@aol.com
Sent: Thursday, September 21, = 2006 3:42=20 PM
Subject: [FlyRotary] Re: Fuel = Pressure=20 Regulator Vacuum or Boost??

Ed,
 You are correct, the "boost reference" is only changed at = more than=20 1 atmosphere. The usually more expensive vacuum and boost referenced = unit=20 would lower the pressure at idle.
Bill Jepson 
 
 
-----Original Message-----
From: joeh@pilgrimtech.com
To: = flyrotary@lancaironline.net
Sent:=20 Thu, 21 Sep 2006 11:48 AM
Subject: [FlyRotary] Re: Fuel Pressure = Regulator=20 Vacuum or Boost??

I presume your pressure = gauge=20 remains steady as you adjust throttle ?
 
Yep, no = real change=20 in FP over the entire range from idle to WOT.
 
Joe Hull
Cozy Mk-IV N31CZ (65 hrs - = Rotary 13B NA)=20
Redmond (Seattle),=20 Washington
Check out the new AOL. Most comprehensive = set of free=20 safety and security tools, free access to millions of high-quality = videos from=20 across the web, free AOL Mail and = more.
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