n00bs Gonna Build a Carden

[gareth.ky]

Vic3D, I looked for the Futaba at the LHS but they were a little low on stock. Hitec HS-5965 is a bit cheaper. I guess for the throttle you want speed, sturdiness and you don't care about torque. The digis are just plain faster.


I realized that there is one job I have no idea how to do: plumb the fuel tank. My fleet is all electric, if it doesn't have wires I'm clueless! Any good links to a How-To out there?

[Flyjunkie]

Looking good!!! Keep those pictures coming

[Vic3D]

	Quote: Originally Posted by gareth.ky
	Vic3D, I looked for the Futaba at the LHS but they were a little low on stock. Hitec HS-5965 is a bit cheaper. I guess for the throttle you want speed, sturdiness and you don't care about torque. The digis are just plain faster. I realized that there is one job I have no idea how to do: plumb the fuel tank. My fleet is all electric, if it doesn't have wires I'm clueless! Any good links to a How-To out there?

Yup. I ordered the 5965 for the throttle myself a couple days ago. .10 speed is awesome.

For the tank:

I recommend a du-bro 32 oz. You want to use all 3 holes. Top one is the vent, and the two bottom ones need a clunk attached to them. One of these lines with a clunk goes to the fuel dot for filling and drawing out. The other clunked line goes straight to the carb. The top line (vent) ou want to twist the brass tubing inside the tank to the tip touches the top of the tank so it will overflow when full. Remember to use a long hose for the vent line so you can loop it around the tank and then back forward and down under the cowl. This is done so you don't lose fuel during flight in downlines.

[eagle1]

vic3d, I thought that was done on the feed line not the vent line, I may be setting mine up wrong.

[Vic3D]

	Quote: Originally Posted by eagle1
	vic3d, I thought that was done on the feed line not the vent line, I may be setting mine up wrong.

What are you referring to?

[Vic3D]

Drew this up just now with Paint. Should clear up some questions.

[porcupineace]

	Quote: Originally Posted by Vic3D
	Drew this up just now with Paint. Should clear up some questions.

dont ya just love diagrams...

[eagle1]

I was refering to the vent line running over the top of the tank, if this is true I am running my feed line over the top, I was told how-to but may have miss understood

[eagle1]

I route my tank just a little different on the inside, I make the fill line out of solid tubing and turn it down to the bottom of the tank

[Vic3D]

	Quote: Originally Posted by eagle1
	I route my tank just a little different on the inside, I make the fill line out of solid tubing and turn it down to the bottom of the tank

That's another way. It's all on how you like it best.

I'm not a big fan of running a tubing down to the bottom like that because I'm scared the clunk might get tangled in it in a violent spin or something. Highly unlikely, but something that would haunt me.

[eagle1]

so vic, is it the vent line that is routed on the top of the tank or the feed line???

[Vic3D]

	Quote: Originally Posted by eagle1
	so vic, is it the vent line that is routed on the top of the tank or the feed line???

The vent line. the one that spits your gas out the bottom when the tank is full. It does the same thing in downlines if you don't loop it.

[gareth.ky]

The fill line goes to the fuel dot.
The feed line goes to the carb.
The vent line goes to the outside to dribble fuel on your toes.

I have the Dubro tank, a PSP stopper cap & fuel dot and gas can from Jersey Modeler.

I've always heard it was the vent line you wanted to wrap around the tank. Mostly its whats going on inside the tank that I have no experience with.

Couldn't we put a check valve on a T and a shutoff valve in the vent line? Check valve would let air in during flight. The shutoff valve would open up for fueling to let air back out. I cant imagine the Jet guys dribbling JP7 all over the place, they must have this figured out?

[Vic3D]

	Quote: Originally Posted by gareth.ky
	Couldn't we put a check valve on a T and a shutoff valve in the vent line? Check valve would let air in during flight. The shutoff valve would open up for fueling to let air back out. I cant imagine the Jet guys dribbling JP7 all over the place, they must have this figured out?

No. If you did that the tank wouldn't be able to breathe and it would suck itself in as gas goes to the motor. You want it to breathe air through that line.

[gareth.ky]

You have Y or a T fitting.

* One side is a check valve that allows air in but not gas out.
* Other side is the vent line with a valve in it you open when filling the tank.



I'm sure there could be a good reason that wouldn't work. Like maybe the draw from the carb isn't enough to actuate the check valve. But the tank wont collapse and the fuel wont spray on your airplane in flight. I assume the Jet guys do this because you don't want a trail of jet fuel running down the fuse to the turbine.