X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 20 [X] Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.25.9.101] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1908272 for flyrotary@lancaironline.net; Wed, 07 Mar 2007 21:50:53 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-02.southeast.rr.com (8.13.6/8.13.6) with SMTP id l282npqF028944 for ; Wed, 7 Mar 2007 21:49:51 -0500 (EST) Message-ID: <000701c7612c$734670c0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Fuel tank vent Date: Wed, 7 Mar 2007 21:49:53 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C76102.8A09DEC0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C76102.8A09DEC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I had essentially the same thing happen when I was running my 13B on a = test stand. A heavy duty plastic marine (outboard motor) fuel can = vent was sitting 24" below the EFI high pressure pumps. One day I was = running the engine and notice it was beginning to act like it was = leaning out - I finally notice that the red plastic tank was sucked = almost flat as I had forgotten to open its vent. So those EFI pumps WILL suck fuel just fine - HOWEVER, if you have the = tiniest air leak - it will suck air much better than that heavy fuel. = So while the pumps can suck fine under the right conditions, it is much = better to have them pushing the fuel. If you have a tiny leak with a = pushing pump, you may get some tiny amount of fuel leaking but your = engine will likely not quit. Personally, having had two incidents with fire, I prefer NO leaks - fuel = or brake fluid. Ed ----- Original Message -----=20 From: George Graham=20 To: Rotary motors in aircraft=20 Sent: Wednesday, March 07, 2007 9:08 PM Subject: [FlyRotary] Fuel tank vent While I was ground testing my motor setup, I used a six gallon plastic = outboard motor tank. It held enough fuel to run wide open for about one = half hour. My fuel pump was a little square "ticker" pump, that produced three = psi. One day I forgot to open the tank vent ( a little knob), I ran that = tank dry, and collapsed the tank into the ugliest ball of plastic you = have ever seen. It was smaller than a basketball.=20 So the worry is, will my tank vent get plugged? I have stainless = steel screen over mine, to keep the bugs out, and point it into the = airstream to help the fuel flow out of the tank. It doesn't need much = air. George Graham Sarasota Florida Mazda RX7 EZ -------------------------------------------------------------------------= ----- 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut. ------=_NextPart_000_0004_01C76102.8A09DEC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I had essentially the same thing happen when I = was running=20 my 13B on a test stand.  A heavy duty plastic  marine = (outboard motor)=20 fuel can  vent was sitting 24" below the EFI high pressure = pumps.  One=20 day I was running the engine and notice it was beginning to act like it = was=20 leaning out - I finally notice that the red plastic tank was sucked = almost flat=20 as I had forgotten to open its vent.
 
So those EFI pumps WILL suck fuel just fine - = HOWEVER, if=20 you have the tiniest air leak - it will suck air much better than that = heavy=20 fuel.  So while the pumps can suck fine under the right conditions, = it is=20 much better to have them pushing the fuel.  If you have a tiny leak = with a=20 pushing pump, you may get some tiny amount of fuel leaking but your = engine will=20 likely not quit.
 
Personally, having had two incidents with fire, = I prefer=20 NO leaks - fuel or brake fluid.
 
Ed
----- Original Message -----
From:=20 George = Graham=20
Sent: Wednesday, March 07, 2007 = 9:08=20 PM
Subject: [FlyRotary] Fuel tank = vent

While I was ground testing my motor setup, I used a six = gallon=20 plastic outboard motor tank.  It held enough fuel to run wide = open for=20 about one half hour.

My fuel pump was a little square "ticker" = pump,=20 that produced three psi.

One day I forgot to open the tank vent = ( a=20 little knob), I ran that tank dry, and collapsed the tank into the = ugliest=20 ball of plastic you have ever seen.  It was smaller than a = basketball.=20

So the worry is, will my tank vent get plugged?   I = have=20 stainless steel screen over mine, to keep the bugs out, and point it = into the=20 airstream to help the fuel flow out of the tank. It doesn't need much=20 air.


George Graham
Sarasota Florida
Mazda RX7 EZ

8:00? 8:25? 8:40? Find=20 a flick in no time
with theYahoo!=20 Search movie showtime shortcut. ------=_NextPart_000_0004_01C76102.8A09DEC0--