Return-Path: Received: from out003.verizon.net ([206.46.170.103] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 548160 for flyrotary@lancaironline.net; Sun, 28 Nov 2004 10:09:33 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.170.103; envelope-from=finn.lassen@verizon.net Received: from verizon.net ([4.12.145.173]) by out003.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20041128150849.LBWQ1463.out003.verizon.net@verizon.net> for ; Sun, 28 Nov 2004 09:08:49 -0600 Message-ID: <41A9EA01.8030003@verizon.net> Date: Sun, 28 Nov 2004 10:08:49 -0500 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Bubbles in fuel line from pump - new valve References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------000909000403050207060805" X-Authentication-Info: Submitted using SMTP AUTH at out003.verizon.net from [4.12.145.173] at Sun, 28 Nov 2004 09:08:49 -0600 This is a multi-part message in MIME format. --------------000909000403050207060805 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Some years ago I actually changed from 1/4" ID hoses (1/8" ID fittings) to 3/8"ID (1/4" ID fittings) on the tank to pump lines. Had a disappointing test flight yesterday. Removed the fuel flow sensor. Replaced it with clear line. That vertical clear line started getting air (vapor?) in it, even after reducing power and pointing nose downwards. Something else is going on here I haven't nailed down. Will put back the fuel tank vent and try again. Finn Bulent Aliev wrote: > > > Finn, I think you should have minimum 1/4" ID fuel lines all around. > No exceptions for fittings etc. I have people buying a 3 GPM pump to > pre-lube their big diesels. They install 1/2" ID hoses all over, but > feed the oil to the engine through a 1/8" ID hole. Then call to > complain that the pump does not perform as advertised. > Buly --------------000909000403050207060805 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Some years ago I actually changed from 1/4" ID hoses (1/8" ID fittings) to 3/8"ID (1/4" ID fittings) on the tank to pump lines.

Had a disappointing test flight yesterday. Removed the fuel flow sensor. Replaced it with clear line.
That vertical clear line started getting air (vapor?) in it, even after reducing power and pointing nose downwards.
Something else is going on here I haven't nailed down. Will put back the fuel tank vent and try again.

Finn

Bulent Aliev wrote:
Re: [FlyRotary] Re: Bubbles in fuel line from pump - new valve


Finn, I think you should have minimum 1/4” ID fuel lines all around. No exceptions for fittings etc. I have people buying a 3 GPM pump to pre-lube their big diesels. They install 1/2” ID hoses all over, but feed the oil to the engine through a 1/8” ID hole. Then call to complain that the pump does not perform as advertised.
Buly
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