X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta05.emeryville.ca.mail.comcast.net ([76.96.30.48] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5598228 for flyrotary@lancaironline.net; Wed, 13 Jun 2012 19:02:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.48; envelope-from=hoursaway1@comcast.net Received: from omta18.emeryville.ca.mail.comcast.net ([76.96.30.74]) by qmta05.emeryville.ca.mail.comcast.net with comcast id MxK21j0011bwxycA5z2NsZ; Wed, 13 Jun 2012 23:02:22 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.26.137]) by omta18.emeryville.ca.mail.comcast.net with comcast id Mz2N1j00L2xV6SL8ez2N4N; Wed, 13 Jun 2012 23:02:22 +0000 Date: Wed, 13 Jun 2012 23:02:22 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <584864594.82877.1339628542352.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: Re: [FlyRotary] Re: Fuel presure question. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_82876_1189730773.1339628542338" X-Originating-IP: [71.206.108.115] X-Mailer: Zimbra 6.0.13_GA_2944 (ZimbraWebClient - IE8 (Win)/6.0.13_GA_2944) ------=_Part_82876_1189730773.1339628542338 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Was not thinking just reading & responding=C2=A0=C2=A0 ( long tough day )= =C2=A0=C2=A0 will watch EM2=C2=A0as I switch off &=C2=A0note response.=C2= =A0 I thought about=C2=A0that with having 3/8" fuel lines=C2=A0 for feed & = 5/16" for return=C2=A0 & this is set up as a return sys. back to the same t= ank the fuel came from.=C2=A0 Steve Boise had some good comments also that = I will follow up on.=C2=A0 David. =C2=A0=20 ----- Original Message ----- From: "Tracy" =20 To: "Rotary motors in aircraft" =20 Sent: Wednesday, June 13, 2012 6:36:24 PM=20 Subject: [FlyRotary] Re: Fuel presure question.=20 My Bad, you couldn't see my tongue-in-cheek.=C2=A0 I was pretty sure it wou= ld stop the engine.=C2=A0=C2=A0 The serious part of the question was what h= appens to the pressure reading on the monitor.=C2=A0 If the reading goes do= wn, the problem is probably the regulator and not instrumentation.=C2=A0 An= d even then it may not be a problem.=C2=A0 the regulator may being pushed b= eyond its design maximum flow rate.=20 Tracy=20 =C2=A0=20 On Wed, Jun 13, 2012 at 6:27 PM, < hoursaway1@comcast.net > wrote:=20 Eng. stops when both are shut off at same time or one after the other, will= check again tonight.=C2=A0=C2=A0 David=20 From: "Tracy" < rwstracy@gmail.com >=20 To: "Rotary motors in aircraft" < flyrotary@lancaironline.net >=20 Sent: Wednesday, June 13, 2012 8:29:41 AM=20 Subject: [FlyRotary] Re: Fuel presure question.=20 Hmmmm... =C2=A0Mine goes up about a pound when I switch on the second pump.= =C2=A0What happens when you turn both off?=20 Tracy=20 Sent from my iPad=20 On Jun 12, 2012, at 7:11 PM, hoursaway1@comcast.net wrote:=20

Question about fuel pressure indications, at fast idle 2200 RPM, fuel press= ure is 42 PSI on EM2, if I switch on the back-up pump with the primary pump= the pressure drops to 35 PSI, can here both pumps running, if I switch off= either pump pressure goes back to 42 PSI.=C2=A0 My system is 13B, stock re= d injectors all four, pressure regulator is stock Mazda on the end of fuel = rail with vacume connection from dynamic chamber.=C2=A0 Thanks,=C2=A0 David= R. Cook=C2=A0 RV6A Rotary.=20

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Was not thinking just reading & responding ( long tough day ) will watch EM2 as I switch off & note response. I thought about that with having 3/8" fuel lines for feed & 5/16" for return & this is set up as a return sys. back to the same tank the fuel came from. Steve Boise had some good comments also that I will follow up on. David.

From: "Tracy" <rwstracy@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, June 13, 2012 6:36:24 PM
Subject: [FlyRotary] Re: Fuel presure question.

My Bad, you couldn't see my tongue-in-cheek. I was pretty sure it would stop the engine. The serious part of the question was what happens to the pressure reading on the monitor. If the reading goes down, the problem is probably the regulator and not instrumentation. And even then it may not be a problem. the regulator may being pushed beyond its design maximum flow rate.

Tracy

On Wed, Jun 13, 2012 at 6:27 PM, <hoursaway1@comcast.net> wrote:

Eng. stops when both are shut off at same time or one after the other, will check again tonight. David

From: "Tracy" <rwstracy@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, June 13, 2012 8:29:41 AM
Subject: [FlyRotary] Re: Fuel presure question.

Hmmmm... Mine goes up about a pound when I switch on the second pump. What happens when you turn both off?

Tracy

Sent from my iPad

On Jun 12, 2012, at 7:11 PM, hoursaway1@comcast.net wrote:

Question about fuel pressure indications, at fast idle 2200 RPM, fuel pressure is 42 PSI on EM2, if I switch on the back-up pump with the primary pump the pressure drops to 35 PSI, can here both pumps running, if I switch off either pump pressure goes back to 42 PSI. My system is 13B, stock red injectors all four, pressure regulator is stock Mazda on the end of fuel rail with vacume connection from dynamic chamber. Thanks, David R. Cook RV6A Rotary.

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