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Question about fuel flow from one tank

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jpspencer(at)cableone.net
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Posted: Mon Sep 08, 2008 5:02 am Post subject: Question about fuel flow from one tank

Morning

 The flow from one tank is common to many planes and  is usually because the rudder isn't trimmed perfectly. You might check yours and  see if that's it in your case.

  

 Joe

   [quote][b]

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dwilde(at)clearwire.net
Guest

Posted: Mon Sep 08, 2008 7:19 am Post subject: Question about fuel flow from one tank

Has the uneven flow from the wing tanks ever resulted in fuel 

starvation?  I can't see how it could unless both tanks were dry. 



Dan Wilde

N948DW

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ggower_99(at)yahoo.com
Guest

Posted: Mon Sep 08, 2008 8:32 am Post subject: Question about fuel flow from one tank

In fact the only time one tank was empty or almost empty (impossible to be sure with electric gauges) was the first time it happened...  our only concern was that the system could suck air from the empty tank and vapor lock, or stop the engine.   Flying over mountains is not fun to look for a place to land.  

 No place to experiment IF the mechanical pump can keep pumping air from one tank and gasoline from the other    to keep both carburator bowls full all the time.

 

The next Saturday we installed the two fuel valves.  

  

 Saludos

 Gary Gower.

 

--- On Mon, 9/8/08, Dan <dwilde(at)clearwire.net> wrote:



  	  Quote: 	
		  From: Dan <dwilde(at)clearwire.net>

Subject: Question about fuel flow from one tank

To: zenith701801-list(at)matronics.com

Date: Monday, September 8, 2008, 11:19 AM



 	  Quote: 	
		  --> Zenith701801-List message posted by: Dan <dwilde(at)clearwire.net>



Has the uneven flow from the wing tanks ever resulted in fuel 

starvation?  I can't see how it could unless both tanks were dry. 



Dan Wilde

N948DW





	
	


         [quote][b]

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Curt.Thompson(at)verizon.
Guest

Posted: Mon Sep 08, 2008 10:46 am Post subject: Question about fuel flow from one tank

Dan,



My concern is that this (fuel from only one tank) is a symptom of one fuel

line being blocked.  How would you know until one tank ran dry and the

spinny thing on the front of the CH701 stopped turning?  I think I would be

sweaty bullets every time that tank ran dry.



Curt

--

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sonar1@cox.net

Joined: 02 Oct 2007
Posts: 55
Location: Santa Barbara, Ca

Posted: Mon Sep 08, 2008 12:00 pm Post subject: Re: Question about fuel flow from one tank

I had this problem too. Landed several times with 10 gallons on one side, and 1 or less on the other.

I did a test with two cut-off soda bottles for tanks "t"- ing down to one line - all quarter inch, and found that a very small bubble was all it took for the fuel to not flow. In every test however, when the flowing tank was empty, the other one started flowing.

 In the airplane I could see an occasional bubble in the fuel line. Used my tv camera on a wire in the fuel tank, and found that the finger screen does not let the bubbles out. Don't know how they got in there in the first place, but they would not go through the screen, even in a full tank. 

I saw the tests, but put in two valves anyway. My fuel now goes to two separate valves at my feet to a ACS gascolator on the firewall.

I can run one or both tanks, and feel sooo much better. I think this is the best solution..........Fred Sanford........N9701

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Curt.Thompson(at)verizon.
Guest

Posted: Mon Sep 08, 2008 1:02 pm Post subject: Question about fuel flow from one tank

Joe,



Are the finger screens you wrote about in the tank?



If it is only draining from the left tank and you shut off the left tank

valve does the fuel start flowing from the right tank?  Then if you open the

left valve again does it start flowing from both?



Curt



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sonar1@cox.net

Joined: 02 Oct 2007
Posts: 55
Location: Santa Barbara, Ca

Posted: Mon Sep 08, 2008 1:37 pm Post subject: Re: Question about fuel flow from one tank

Yes, the finger screens were supplied with the kit, and go inside the tank. I potted a small tv camera with epoxy,  and stuck in down into the tank to watch the bubbles.

I have full control over the fuel - that's the way it should be. I usually do an hour from each tank, rarely turning them both on at the same time.

....Fred.....N9701

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