Return-Path: Received: from fed1mtao06.cox.net ([68.6.19.125] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3082776 for flyrotary@lancaironline.net; Wed, 17 Mar 2004 09:36:12 -0500 Received: from BigAl ([68.107.116.221]) by fed1mtao06.cox.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040317143608.UGPU19401.fed1mtao06.cox.net@BigAl> for ; Wed, 17 Mar 2004 09:36:08 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: mainfold hose Date: Wed, 17 Mar 2004 06:36:20 -0800 Message-ID: <000001c40c2d$37139b70$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C40BEA.28F05B70" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C40BEA.28F05B70 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Perry wrote: If you are flying and running only one h.p. fuel pump, and that pump fails, the engine will become silent only milliseconds later! This is interesting. As my circuit diagram is currently configured, I have a pressure switch in the fuel system which automatically turns on the backup pump if the pressure drops below about 30 psi. (don't remember now the exact setting on the pressure switch). Do you suppose that this wouldn't react fast enough to keep the engine running? There is a manual bypass so I can turn the pump on if I want. The idea was to turn on both pumps for takeoff, but at other times the backup would automatically kick in to keep the engine from stopping if the primary pump stopped; thereby avoiding rapid heart rates on the part of pilot and passengers. Al ------=_NextPart_000_0001_01C40BEA.28F05B70 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Perry wrote:

<= /font>

If you are flying and running only one h.p. fuel pump, and that pump fails, = the engine will become silent only milliseconds later!

This is interesting. As my circuit diagram is currently configured, I have = a pressure switch in the fuel system which automatically turns on the = backup pump if the pressure drops below about 30 psi. (don’t remember now the = exact setting on the pressure switch). Do you suppose that this = wouldn’t react fast enough to keep the engine running?

<= /font>

There = is a manual bypass so I can turn the pump on if I want. The idea was to = turn on both pumps for takeoff, but at other times the backup would = automatically kick in to keep the engine from stopping if the primary pump stopped; = thereby avoiding rapid heart rates on the part of pilot and = passengers.

<= /font>

------=_NextPart_000_0001_01C40BEA.28F05B70--