X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm8-vm0.bullet.mail.ne1.yahoo.com ([98.138.91.23] verified) by logan.com (CommuniGate Pro SMTP 5.4c2o) with SMTP id 4882861 for flyrotary@lancaironline.net; Fri, 25 Feb 2011 16:16:50 -0500 Received-SPF: none receiver=logan.com; client-ip=98.138.91.23; envelope-from=ceengland@bellsouth.net Received: from [98.138.90.50] by nm8.bullet.mail.ne1.yahoo.com with NNFMP; 25 Feb 2011 21:16:13 -0000 Received: from [98.138.87.6] by tm3.bullet.mail.ne1.yahoo.com with NNFMP; 25 Feb 2011 21:16:13 -0000 Received: from [127.0.0.1] by omp1006.mail.ne1.yahoo.com with NNFMP; 25 Feb 2011 21:16:13 -0000 X-Yahoo-Newman-Id: 422165.88157.bm@omp1006.mail.ne1.yahoo.com Received: (qmail 28395 invoked from network); 25 Feb 2011 21:16:13 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bellsouth.net; s=s1024; t=1298668573; bh=5xKiuQkc5nVDZgFObqNfDGvzICT6QZ+kPdDfU8oBBaM=; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type; b=E2iNqkck/fhmTcicEnqnr/RHsrb5ZnZ3goP5RXNIDMRnnTtne4VVXzHfdIh4i6U8H1fMviKdI3Rk61OWjovKS8MiHyh4wYhaNYpNnEv8tIvGjcSVj50F7rbadUgj7YMCb6F0E3tKkUTZ4/JNQGoIK7Fd2bunqNHWvYBrl5VvLd4= Received: from [192.168.10.5] (ceengland@74.240.6.77 with plain) by smtp104.sbc.mail.ne1.yahoo.com with SMTP; 25 Feb 2011 13:16:12 -0800 PST X-Yahoo-SMTP: uXJ_6LOswBCr8InijhYErvjWlJuRkoKPGNeiuu7PA.5wcGoy X-YMail-OSG: BCok1vwVM1nEQEycP7pyZkGf6xfCUsxPPXFkEQ4ml7v9vV3 Rws8ZxIBZ0cUVjar_PnuZ3DCjj1yG739BUqA8EyhYWxH.e6Zusb49f7nXWT. P6KfoXii8PjEBVMseImJiXeB1Tv3Gxg4e7xrNdUJRvyjtK42fEFAHV4RelIM V83dw6PIW.XwbcINvMedf.2CW7LkEGjLukug2bUDUCjEDeUA4mjfXi3dPbHH u X-Yahoo-Newman-Property: ymail-3 Message-ID: <4D681C1C.8060906@bellsouth.net> Date: Fri, 25 Feb 2011 15:16:12 -0600 From: Charlie England User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Fuel return line References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------020204030205090501030605" This is a multi-part message in MIME format. --------------020204030205090501030605 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 2/25/2011 2:19 PM, Raymond Lambert wrote: > /I am about to put /the fuel tank in my first wing. I have to weld a > flange on it for the fuel return line. Anyone can tell me if a 1/4" > fuel return line is large enough ???? > > Raymond I recently purchased a Mallory brand regulator, & it actually specs the return line size, based on HP & return flow. IIRC, 1/4" was marginally adequate. If you haven't bought anything yet, why not go with 3/8"? If you later discover that 1/4" is good enough, a half-ounce threaded bushing, or the right (3/8"NPT to AN4) fitting gets you back to that size. Remember, (as Tracy pointed out in a recent post) some of the time over 90% of the fuel will get bypassed back to the tank. Charlie --------------020204030205090501030605 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 2/25/2011 2:19 PM, Raymond Lambert wrote:
I am about to put the fuel tank in my first wing. I have to weld a flange on it for the fuel return line. Anyone can tell me if a 1/4" fuel return line is large enough ????

Raymond
I recently purchased a Mallory brand regulator, & it actually specs the return line size, based on HP & return flow. IIRC, 1/4" was marginally adequate. If you haven't bought anything yet, why not go with 3/8"? If you later discover that 1/4" is good enough, a half-ounce threaded bushing, or the right (3/8"NPT to AN4) fitting gets you back to that size. Remember, (as Tracy pointed out in a recent post) some of the time over 90% of the fuel will get bypassed back to the tank.

Charlie
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