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Dan Wilde
Joined: 05 Jun 2011
Posts: 34
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 Posted: Tue Sep 18, 2012 9:16 pm Post subject: Left\Right Fuel Systems? |
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On 9/18/2012 8:53 PM, John Marzulli wrote:
| Quote: | After ~150 hours of flying I am changing my fuel system from the
factory plans. The problem\hassel of fuel sloshing and un-even feeding
in flight has been too much.
What I am proposing \ doing is to have to quick drains on "T" pipes
where the factory gascolator is. From there each line would move
forward into the cabin and have it's own fuel filter.
The fuel filters will then feed into a Left\Right\Both selector. From
the selector the fuel would go to a "real" gascolator and then finally
into the engine.
I simply installed valves on each fuel line as it enters the cabin above
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my head. Since the right tank feeds first on my airplane, that is the
only valve I need to control during flight. Works great for me.
Dan Wilde
N948DW
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sonar1@cox.net
Joined: 02 Oct 2007
Posts: 55
Location: Santa Barbara, Ca
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| Posted: Wed Sep 19, 2012 8:07 pm Post subject: Re: Left\Right Fuel Systems? |
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I have been flying my 701 for 7 years, and have had my share of fuel feeding concerns. I tried several tests with simulated fuel tanks, and found out that small bubbles will clog the small 1/4 fuel line and cause one tank to feed, and not the other. With a small tv camera, I found little bubbles on the finger screens in the tanks. I replaced the Zenith gascolator, tried larger fuel lines, tried extra venting etc.
After all of this, I settled on a system that works just fine. The two tank fuel lines go to two valves in front of the pilot seat (poor man's left-right valve), which connect to one hose that goes through the firewall to an Aircraft Spruce gascolator, and then to the fuel filter and the engine. Am still able to use the standard gas caps - never have water in my fuel - and am using a real gascolator with a screen, and fuel management is no problem. I keep both valves open until one tank gets lower than the other, and then just turn off that tank for a while.
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