X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3329665 for flyrotary@lancaironline.net; Wed, 03 Dec 2008 19:55:21 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao104.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20081204005445.XNXL11567.fed1rmmtao104.cox.net@fed1rmimpo02.cox.net> for ; Wed, 3 Dec 2008 19:54:45 -0500 Received: from BigAl ([72.192.137.74]) by fed1rmimpo02.cox.net with bizsmtp id moul1a00G1cVYgg04oul4F; Wed, 03 Dec 2008 19:54:45 -0500 X-Authority-Analysis: v=1.0 c=1 a=jv6k2CzZXvC-38LuN6UA:9 a=ay-9jEfjmIyZ_aeufOU-5x2EIrEA:4 a=5FtdkfQUxfIA:10 a=_7itERBKQ-Gx-v_nzvIA:9 a=4uaftaam_sehDJgWPx0A:7 a=14mDYGnr01kTUaPmDxp8v0uFif4A:4 a=37WNUvjkh6kA:10 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Fuel system Date: Wed, 3 Dec 2008 16:54:57 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01C95567.DF815F80" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-reply-to: X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0013_01C95567.DF815F80 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Well; there is, but of course it is dependant on air frame design. My Velocity has gravity feed from both mains to a 3 gallon sump, gravity = feed from sump to the EFI pump; regulator return to the sump. Now that's = simple. Al G It obviously works for you but I still have a hard time thinking about = how the sump tank vents properly. Maybe it doesn't need one? Or do you = vent it up to the mains. But then there's that complexity again :>) =20 Tracy (just trying to wrap my head around this system) =20 Well; OK. I didn't mention the vents - but that's simple as well. A = vent line from the top of each main comes into the cabin at the firewall = (back near the firewall the side of the cabin is the inboard wall of the main tanks); and the vent from the top of the sump (which is at the firewall) comes up to where they manifold together near the top of the firewall = (above all fuel levels). From there a single line comes off the top of the manifold, makes a U-turn and exits out the bottom. =20 Al G =20 P.S. Tracy; did you get my e-mail re the TC alarming; or is it just as = much a mystery to you? =20 ------=_NextPart_000_0013_01C95567.DF815F80 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Well; there is, but of course it = is dependant on air frame design. My Velocity has gravity feed from both mains to a 3 gallon = sump, gravity feed from sump to the EFI pump; regulator return to the = sump. Now that's simple.

Al = G

It obviously works for you but I still have a = hard time thinking about how the sump tank vents properly. Maybe = it doesn't need one? Or do you vent it up to the mains. But = then there's that complexity again :>)

Tracy (just trying to wrap my head around this system)

Well; OK. I didn’t mention = the vents – but that’s simple as well. A vent line from = the top of each main comes into the cabin at the firewall (back near the = firewall the side of the cabin is the inboard wall of the main tanks); and the vent = from the top of the sump (which is at the firewall) comes up to where they = manifold together near the top of the firewall (above all fuel levels). From there a = single line comes off the top of the manifold, makes a U-turn and exits out the = bottom.

Al G

P.S. Tracy; did you get = my e-mail re the TC alarming; or is it just as much a mystery to you? =

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