X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.52.245.18] (HELO ispwestemail2.mdeinc.com) by logan.com (CommuniGate Pro SMTP 4.3.2) with ESMTP id 968200 for flyrotary@lancaironline.net; Mon, 30 May 2005 16:06:55 -0400 Received-SPF: none receiver=logan.com; client-ip=216.52.245.18; envelope-from=wschertz@ispwest.com Received: from 7n7z201 (unverified [63.13.186.34]) by ispwestemail2.mdeinc.com (Vircom SMTPRS 4.1.361.20) with SMTP id for ; Mon, 30 May 2005 13:06:06 -0700 Message-ID: <01b501c56552$ffdcef00$6401a8c0@7n7z201> From: "William" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: will EFI pumps pump air Date: Mon, 30 May 2005 15:05:59 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01B2_01C56529.16A20AB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_01B2_01C56529.16A20AB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageBe careful with the system of pumping from one tank and returning = to the other. With the flow rates that an EFI pump returns to the tank, = it would require very active tank managment to avoid sucking the one = tank dry. this caused an engine out/off field landing for the prototype = Pulsar 100 a few years back. Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Monday, May 30, 2005 2:45 PM Subject: [FlyRotary] Re: will EFI pumps pump air One thing I'm considering is to just use the regular pumps to transfer fuel. If you plumb the tanks to a fuel selector, then when you select the aux side the excess flow will end up in what's now your primary tank. This is probably a step better than having one pump per tank. The = only negative I see is not being able to run the tank out without = killing the engine. With all the tanks you're talking about having, = that's probably not a big deal, but the RV-3 only has two 15 gallon = tanks, so using every last gallon is useful (if I ever went anywhere).=20 I've seen the 1st idea work in certified planes; the 2nd idea is wild speculation. Thanks, but I have enough wild speculation of my own :-) Charlie (Wish you could have made it up here this weekend; if you get bored & need a place to fly come on up for lunch sometime.) Roger. It might happen some day. =20 Rusty ------=_NextPart_000_01B2_01C56529.16A20AB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Be careful with the system of pumping = from one tank=20 and returning to the other. With the flow rates that an EFI pump returns = to the=20 tank, it would require very active tank managment to avoid sucking the = one tank=20 dry. this caused an engine out/off field landing for the prototype = Pulsar 100 a=20 few years back.
 
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Monday, May 30, 2005 2:45 = PM
Subject: [FlyRotary] Re: will = EFI pumps=20 pump air

One thing I'm considering is to just use the regular = pumps to=20 transfer
fuel. If you plumb the tanks to a fuel selector, then when = you=20 select
the aux side the excess flow will end up in what's now your=20 primary
tank.

This = is probably a=20 step better than having one pump per tank.  The only negative I = see is=20 not being able to run the tank out without killing the engine.  = With all=20 the tanks you're talking about having, that's probably not a big deal, = but the=20 RV-3 only has two 15 gallon tanks, so using every last gallon is = useful (if I=20 ever went anywhere).

I've seen the 1st idea work in certified planes; the 2nd idea is=20 wild
speculation.

Thanks, but I have = enough wild=20 speculation of my own :-)

Charlie
(Wish you could = have made=20 it up here this weekend; if you get bored &
need a place to fly = come on=20 up for lunch sometime.)

Roger.  It might = happen some=20 day. 

Rusty

 

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