Mailing List flyrotary@lancaironline.net Message #13215
From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Bubbles in fuel line from pump - new valve
Date: Sat, 27 Nov 2004 19:07:37 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Re: [FlyRotary] Re: Bubbles in fuel line from pump - new valve On 11/27/04 1:31 PM, "Finn Lassen" <finn.lassen@verizon.net> wrote:

Yes, I'm using only auto fuel. Removing the sensor definitely improved the situation in past tests. I guess I should try removing it now that I have eliminated "U"s (possible air pockets) in the lines and use a simple shut off valve.

Actually the outlet from the tank is probably too small. 1/8" NPT to 3/8" barb brass fitting drilled out to the point where I hoped the threads were still strong enough to not break, if I remember correctly. I'm not sure if I have enough material in the tank to go up to 1/4" NPT fitting. Will have to look at that when I get around to taking out the tank.

Finn

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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