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Fuel line setups

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Old 05-20-2008, 03:31 PM
  #1
ro347
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Default Fuel line setups

Im now into planes where the Engines are completely covered making it difficult to pull fuel lines to refuel. Would you guys know where I can find diagrams to use as reference showing 3 line setups etc.? I want to make sure i get it right the first time .


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Old 05-20-2008, 03:35 PM
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Default RE: Fuel line setups


Quote:
ORIGINAL: ro347

Im now into planes where the Engines are completely covered making it difficult to pull fuel lines to refuel. Would you guys know where I can find diagrams to use as reference showing 3 line setups etc.? I want to make sure i get it right the first time .


Thanks

Here ya go.

Ken
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Old 05-20-2008, 04:03 PM
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Default RE: Fuel line setups

I'm a big fan of the Dubro Fill It fueling system:

http://www3.towerhobbies.com/cgi-bin...?&I=LXAHE1&P=7

It allows you to add a third line and second clunk to your tank so you can fill and empty your tank through it without having to get to the carburator line.
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Old 05-20-2008, 04:10 PM
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Default RE: Fuel line setups

If the hardware is available to add a second clunk like Ed metnioned that is better. The Dubro system is great in that it gives you what is needed to add a second clunk. If not the setup I shown above works well. Have the third line pointed towards the bottom of the tank, and then you can tip up the plane to pump the fuel out of the tank.

Ken
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Old 05-20-2008, 06:08 PM
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ro347
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Default RE: Fuel line setups

Thanks guys
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Old 05-21-2008, 12:50 PM
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Default RE: Fuel line setups

Another good option.....

[link]http://www3.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=S750[/link]

Alex
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Old 05-21-2008, 03:19 PM
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Default RE: Fuel line setups

Even better option:

[link=http://www.airborne-models.com/html/AccessoriesGroup.asp?AGroupID=4]Click me![/link]

With these you can even do "pinch tests" without needed to remove the cowl nor access any of the tubing.

Click on Fuel Filler on the above link.
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Old 05-21-2008, 03:27 PM
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Default RE: Fuel line setups

Sorry man, but your link doesn't work.[:-]
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Old 05-21-2008, 03:48 PM
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Default RE: Fuel line setups

Fixed try again.

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Old 05-21-2008, 09:31 PM
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Default RE: Fuel line setups

This may better illustrate the system oppose is talking about. its a simple two line system just like a trainer no third line, fuel dot or fueling device needed and it allows pinch tunning:

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Old 05-24-2008, 02:42 AM
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Default RE: Fuel line setups

what exactly is a fuel dot?
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Old 05-24-2008, 05:30 AM
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Default RE: Fuel line setups

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXK138
These are fuel dots
Cheers[8D]
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Old 05-24-2008, 07:24 AM
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Default RE: Fuel line setups


Quote:
ORIGINAL: Mikeis45

what exactly is a fuel dot?
Fuel Dots are essentially plugs for fuel lines that are most often used during fueling / refueling / emptying the tank. In Ken's picture above the bottom line would have a fuel dot, or plug, inserted during the running of the engine.
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Old 05-24-2008, 01:24 PM
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Default RE: Fuel line setups

how does one use the above setup and fuel the plane, without overflowing fuel in to the muffler?
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Old 05-24-2008, 04:17 PM
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Default RE: Fuel line setups

Hi snurckle. If you are talking about the two line system that I pictured in post #10 and Opjose has shown a neat device for then The answer to your question depends on the engine mounting orientation and muffler type.

If the engine is mounted sideways then the cylinder head in on the right side and the stock muffler will protrude to the right bottom and the pressure nipple will be exposed It can be removed for fueling just like a trainer. In this set up the engine cannot be hydrolocked by some accidental flow into the muffler since it is below the chamber if you should forget.

If the engine is fully inverted with a stock muffler or tuned pipe it will be on the right side and agine the pressure tap will be exposed In this case you must not forget to remove the pressure line or overflow will go directly to the chamber hydrolocking the engine.

If you are using any form of completely inaccessable muffler or some type of Pitts then the pressure line is passed out and in the cowl just like the feed line and also provided with a split so it is easily separated just like the feed line to check your overflow just like a trainer. It can be on either side of the cowl.

This is the most trouble free fueling system possible and yes its just my opinion. I use it on everything even on exposed engines with rear needle valves.


John
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Old 05-24-2008, 04:42 PM
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Default RE: Fuel line setups

Interesting. My current build is a TF Corsair, with an RCV 120 SP 4 stroke. I was thinking about this after my previous post, and think I have a good solution, that is both clean, and fairly simple.

I'm planning on installing a refueler valve assy [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXD745&P=0]Dubro Refueling Valve[/link]

I will now be installing 2 of them. One for the fueling line, and one for the pressure line. The valve stops flow when the kwik fueling probe is inserted, so that it can only go in one direction. So, by installing both 'nozzles' you can fill with one, and catch overflow with the other, and alleviates the need to disconnect from the muffler, which I will not have access to once the cowl is installed.
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