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Glow Fuel Line "plumbing" Question - 5/5/2012 7:36 PM   
SeamusG



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Status: offline 		Has anybody used a three line fuel tank installation with the 3rd line (refueling line) connected to an external quick fill fuel valve? It would allow the line to the HS needle to be a short and straight shot.

Comments?


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RE: Glow Fuel Line - 5/5/2012 7:46 PM   
Scar



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Status: offline 		Sure, I have. Cub, Tequila Sunrise, FW190, maybe others.

Or a fuel "dot". Either way, convenient installation, not much extra work on the tank.

Good luck.
Dave Olson

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RE: Glow Fuel Line - 5/5/2012 9:08 PM   
SeamusG



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Status: offline 		Thanks Dave - 'preciate it.

What "brand" of valve do you use?

I've plumbed the fuel line (in a 2 line approach) between the tank and HS needle thru the side of the cowl with enough slack to allow pulling the line apart "outside" the cowl. A filter fits nicely too allowing for cleaning of the filter without removing the cowl.


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RE: Glow Fuel Line - 5/5/2012 9:16 PM   
JohnBuckner



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quote:

ORIGINAL: JohnGilmore

Thanks Dave - 'preciate it.

What ''brand'' of valve do you use?

I've plumbed the fuel line (in a 2 line approach) between the tank and HS needle thru the side of the cowl with enough slack to allow pulling the line apart ''outside'' the cowl. A filter fits nicely too allowing for cleaning of the filter without removing the cowl.




Then why the third line John? Fill the airplane at that point there is no need for a third line. I use two line systems on all my airplanes cowling or not and even my gassers.

John

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RE: Glow Fuel Line - 5/6/2012 1:56 AM   
jetmech05


 

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Status: offline 		I always use a 3 line system.....works great..With a fuel dot not a fueling valve...a valve will eventually leak causing dead sticks

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RE: Glow Fuel Line - 5/6/2012 2:51 AM   
Charlie P.



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Status: offline 		Agree.  I have that on my Saratoga 40, and Giant Supersportster with just a simple fuel dot.  The "valves" are for "T"ing into a two tube system.

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RE: Glow Fuel Line - 5/6/2012 2:57 AM   
SeamusG



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quote:

ORIGINAL: JohnBuckner

Then why the third line John? Fill the airplane at that point there is no need for a third line. I use two line systems on all my airplanes cowling or not and even my gassers.



JB - always worth asking questions. If ya don't ask then ya won't learn a damn thing will ya?

There is always an exception to a rule. If you only have a hammer then everything needs to be a nail.


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RE: Glow Fuel Line - 5/6/2012 4:06 AM   
JohnBuckner



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Status: offline 		Also John one advantage of the external split carb line that you also used is in the case of a two stroke glow it gives you a very handy place to pinch the line for pinch tuning which one of the photos I posted illustrates.

Ya' see a hammer can really be a multi tasking tool


John

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RE: Glow Fuel Line - 5/6/2012 4:42 AM   
SeamusG



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Status: offline 		Yea - but I keep hittin' my fingers.

Em, Kingman - a friend built there - a guy named Wylie (Coyote) Timbrook. Ever cross paths?



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RE: Glow Fuel Line - 5/6/2012 5:24 AM   
JohnBuckner



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Status: offline 		Hmm not familiar with that name, There is a fellow named tim that has been flying here for a few months lately though.

John



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RE: Glow Fuel Line - 5/6/2012 11:44 AM   
SeamusG



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Status: offline 		John - I think that you're cowl "external fuel line" approach motivated me in using the same approach on my Aero-works Edge. Thanks.


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RE: Glow Fuel Line - 5/6/2012 1:31 PM   
pmerritt


 

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Status: offline 		I won't say which picture but that sure looks tacky (fugly) to have all that fuel line protruding outside of a beautiful cowl.  Fuel dot (doesn't require hard pushing to get a filler adapter into) or fuel valve which can be mounted to a hard back so one doesn't compress and crack the cowl looks neat, proper and doesn't require butchering the cowl.  If one needs to constantly pinch test their engine, fly w/o a cowl until she's tuned. 
Now, on the other hand, having external visibility to a fuel line will allow one to check for bubbling and possible tank/hose leaks but that also is a routine maintenance issue and shouldn't have to be an every day checkup.  A full cowl is a full cowl.  It's painful enough to have to gouge it for exhaust, HSN and carb inlets the way it is.  Sometimes it's about looks and the others is about convenience I guess.

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RE: Glow Fuel Line - 5/6/2012 2:53 PM   
hairy46


 

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quote:

ORIGINAL: JohnBuckner

quote:

ORIGINAL: JohnGilmore

Thanks Dave - 'preciate it.

What ''brand'' of valve do you use?

I've plumbed the fuel line (in a 2 line approach) between the tank and HS needle thru the side of the cowl with enough slack to allow pulling the line apart ''outside'' the cowl. A filter fits nicely too allowing for cleaning of the filter without removing the cowl.




Then why the third line John? Fill the airplane at that point there is no need for a third line. I use two line systems on all my airplanes cowling or not and even my gassers.

John

That is such a great idea! Thank you for it!

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RE: Glow Fuel Line - 5/6/2012 5:22 PM   
jetmech05


 

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Status: offline 		I agree with Pmerrit I don't like the looks of the line going in and out of the cowl either....3 line for me...

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RE: Glow Fuel Line - 5/6/2012 6:31 PM   
landeck


 

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RE: Glow Fuel Line - 5/6/2012 7:37 PM   
Gray Beard


 

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Status: offline 		I use both the three line and a dot plus the split line like John. Just depends on the plane and my mood at the time. Two line split is the easiest to set up and most trouble free but I do use the three line more often, No good reason but it just works out that way?

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RE: Glow Fuel Line - 5/7/2012 1:20 AM   
charlie1960


 

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Status: offline 		I use fuel dots on cowled engines.
Exposed engines i just pull the line off the carb to fuel and defuel.


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RE: Glow Fuel Line - 5/7/2012 1:21 AM   
flycatch


 

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Status: offline 		Your kidding. This and the two line system have been in existence for the past thirty years if not longer. Three line method is the way to go for both glow and gas. Fuel dots only inhance not distract from the appearence of the cowl. Don't invest in a chaep fuel dot get one sold by Sullivan.

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RE: Glow Fuel Line - 5/7/2012 2:01 AM   
SeamusG



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Status: offline 		flycatch - I've seen fuel dot lines hanging out the bottom of cowls - flopping in the breeze. I've also seen fuel dots that are flush mounted in either the cowl or fuse side and are pulled out to affect refueling. How do you mount yours?


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RE: Glow Fuel Line - 5/7/2012 3:00 AM   
flycatch


 

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Status: offline 		That is a common problem but easy to fix. I just run a larger ID tubing over the fuel line in use. This provides a form of locking mechanisim that the "o ring" on the fuel dot does not accomplish.

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RE: Glow Fuel Line - 5/7/2012 3:01 AM   
Gray Beard


 

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quote:

ORIGINAL: JohnGilmore

flycatch - I've seen fuel dot lines hanging out the bottom of cowls - flopping in the breeze. I've also seen fuel dots that are flush mounted in either the cowl or fuse side and are pulled out to affect refueling. How do you mount yours?


Dots are usually mounted in the fuse and not the cowl unless reinforced with hardwood. There is an O-ring that is on the nipple end of the dot, the part that goes inside the tube part. The O-Ring makes it a tight squish fit. They aren't anything fancy. If you see the line dangling either the O-ring needs replacing or it has broken off completely.

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RE: Glow Fuel Line - 5/7/2012 4:30 AM   
JohnBuckner



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Status: offline 		Also in the case of a completely exposed engine with rear needle valves there is never agine the need to use needlenose pliers every time you fuel when a simple split carb line is used

John

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RE: Glow Fuel Line - 5/7/2012 4:43 AM   
Gray Beard


 

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quote:

ORIGINAL: JohnBuckner

Also in the case of a completely exposed engine with rear needle valves there is never agine the need to use needlenose pliers every time you fuel when a simple split carb line is used

John

Known fact it would still look better with a fuel dot!!!

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RE: Glow Fuel Line - 5/7/2012 4:53 AM   
JohnBuckner



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Status: offline 		Nope, might just as well be better off corkin' it with the old outhouse door knob.

John



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RE: Glow Fuel Line - 5/7/2012 5:14 PM   
MTK



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quote:

ORIGINAL: Gray Beard

Known fact it would still look better with a fuel dot!!!


I agree...fuel dots clean up the outside of the model nicely. Sullivan makes a good one and Central Hobbies does also. A 2 line set-up works great for gas engines since the Walbro carbs prevent fuel backflow that will flood the engine

The only caveat in a fuel dot with 2 line plumbing for glow engines is that fuel when filling will hit the "tee" and travel in both directions, to the tank and the carb or pump. Carbs will flood and many pumps will allow just enough fuel through to flood just the same. For glow engines, it's better to have the fuel dot connected to the third or fill line. Also, the fuel dot should be placed higher than the tank to keep it from leaking as you remove the fill fitting


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