X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from blu0-omc2-s25.blu0.hotmail.com ([65.55.111.100] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3280296 for flyrotary@lancaironline.net; Fri, 07 Nov 2008 06:54:57 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.55.111.100; envelope-from=neilak@sympatico.ca Received: from BLU0-SMTP16 ([65.55.111.73]) by blu0-omc2-s25.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Fri, 7 Nov 2008 03:54:14 -0800 X-Originating-IP: [69.158.2.24] X-Originating-Email: [neilak@sympatico.ca] Message-ID: Return-Path: neilak@sympatico.ca Received: from NeilPC ([69.158.2.24]) by BLU0-SMTP16.blu0.hotmail.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.2668); Fri, 7 Nov 2008 03:54:13 -0800 From: To: "'Rotary motors in aircraft'" In-Reply-To: Subject: RE: [FlyRotary] Fuel considerations Date: Fri, 7 Nov 2008 06:54:05 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0063_01C940A5.A08B1220" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 Thread-Index: AclAk01rDBeQ5o2RRY+sj7gDt26agwAOXbSA X-OriginalArrivalTime: 07 Nov 2008 11:54:13.0878 (UTC) FILETIME=[8DD5D960:01C940CF] This is a multi-part message in MIME format. ------=_NextPart_000_0063_01C940A5.A08B1220 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Brooks, Returning to a single tank is not a great idea. One day, flying along, fat, dumb and happy, you'll forget you're draining from one tank and filling the other till it over-flows and you send your liquid gold overboard, out the vent (Ask me how I know.) Best case, you'll have gas stains all along the fuselage. Medium case, you'll smell gas in the cockpit and suck up a seat cushion wondering what broke. Worst case, you won't have fuel to make you destination. Andair make the perfect solution with their FS20-20 Duplex Fuel Selector. Send the fuel back to the tank that it came from. (You need to keep it simple for the stupid pilot.) No check valves to hang up. Then like all other RVs flying, you run an hour on one tank, switch, run an hour on the other and back and forth. Neil _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Brooks Wolfe Sent: Thursday, November 06, 2008 11:42 PM To: Rotary motors in aircraft Subject: [FlyRotary] Fuel considerations The airplane I fly in my day job gave me an idea for my RV-7 rotary project. This airplane requires the center tank to be burned first, then the wing tanks may be used. To accomplish this, there are no sophisticated electronics nor any active logic at work; there are simply check valves in the system that allow the higher-pressure center pumps to push fuel ahead of the wing tank's pumps. When the center tanks run dry, the check valves close from reduced fuel pressure, allowing fuel from the wings to flow. Soo, if it works for Boeing, it should work for a rotary, right? I figure in this case, fuel lines would join together at some point with check valves to prevent back-pressurizing the tank that's not being used. Switching tanks would be a simple matter of turning one pump on, and the other pump off. For simplicity, I'm only planning on return fuel to one tank. Any thoughts? Brooks RV-7 -- Wiring up the EC2 for the engine's first run! Rent our "Sky's Landing" Beach House direct from us and save! Need a vacation? see http://vrbo.com/210620 ------=_NextPart_000_0063_01C940A5.A08B1220 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Brooks,

=

      =     Returning to a single tank is not a great idea.  One day, flying along, fat, = dumb and happy, you’ll forget you’re draining from one tank and = filling the other till it over-flows and you send your liquid gold overboard, = out the vent  (Ask me how I know…)  Best case, you’ll have = gas stains all along the fuselage.  Medium case, you’ll smell gas = in the cockpit and suck up a seat cushion wondering what broke.  Worst = case, you won’t have fuel to make you = destination.

       &= nbsp;  Andair make the perfect solution with their FS20-20 Duplex Fuel Selector.  Send the fuel back to the tank that it came from.  = (You need to keep it simple for the stupid pilot.)  No check valves to = hang up.  Then like all other RVs flying, you run an hour on one tank, switch, run = an hour on the other and back and forth.
Neil

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Brooks Wolfe
Sent: Thursday, November = 06, 2008 11:42 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Fuel considerations

 

The = airplane I fly in my day job gave me an idea for my RV-7 rotary project.  = This airplane requires the center tank to be burned first, then the wing = tanks may be used.  To accomplish this, there are no sophisticated electronics nor any active logic at work; there are simply check = valves in the system that allow the higher-pressure center pumps to push fuel = ahead of the wing tank's pumps.  When the center tanks run dry, = the check valves close from reduced fuel pressure, allowing fuel from the = wings to flow.

 

Soo, = if it works for Boeing, it should work for a rotary, right?  I figure in this = case, fuel lines would join together at some point with check valves to = prevent back-pressurizing the tank that's not being used.  Switching = tanks would be a simple matter of turning one pump on, and the other pump = off.  For simplicity, I'm only planning on return fuel to one = tank.

 

Any = thoughts?

 

Brooks

RV-7 = -- Wiring up the EC2 for the engine's first run!

 

Rent our "Sky's Landing" Beach House direct from us and = save!

Need a vacation? see http://vrbo.com/210620=

 

 

 

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