I'm trying to use a small 3oz tank on an OS .15LA

The problem is the clunk line is so short that it wont bend, it just sticks straight out.

It wont flop down to the bottom of the tank like it would in a longer tank.

I tried a thinner more flexible piece of hose I found but it was so small and tight fitting it split and fell off on my first flight.

My 4 oz tank seems just long enough so the clunk line will bend down to the bottom of the tank...( or top of the tank when inverted )

Any suggestions?




Steve

I think it is Sullivan that has a very thin-walled and flexible Silicon glow fuel line. If you can't find that, how about a heavier clunk?

silicone line[8D] had to do it on the 4 oz combat tanks.

If the tank has a standard rubber stopper with brass tubes going through it, cut the one for the clunk line as short as possible inside the tank.
Sullivan fuel tubing http://www3.towerhobbies.com/cgi-bin...&I=LXLW04&P=SM
Hayes fuel tubing http://www3.towerhobbies.com/cgi-bin...&I=LXK824&P=SM
Not sure which is more flexible

It would seem to me that you have the brass line that clunk is connected to too long for it to permit clunk to move. Cut it only long enough to enable you to attach clunk line to it. Probably about 3/8".

I think you need a heavier clunk as someone said above....we use them on gassers and tygon line

Sullivan does make the silicon that has a lot more flex. I have noticed that my Dubro tanks are now just giving us standard old fuel line and it doesn't flex like the older line they used to come with. Clunks also come in different sizes and weights. I am able to find both clunks and line at my LHS.

Agree the new Bubro line sucks. I reload so I copper wire a 30-06 bullet to the line just above the clunk. Takes that much extra weight to droop.

Sad,

Tom

I had one like that and I hammered a 1/2 ounce fishing weight out flat and wrapped it around the clunk. It clunked really well after that, and I had no ill effects that I could tell in a couple of years of using it.

Small tanks are cursed with very short clunk lines that don't move. Even a very flexible line won't have much movement. Just settle for bending the brass pipe a bit so that that the clunk goes to the bottom. Then go fly and have fun.

It is just a matter of finding the right fuel line. I have used small lightweight clunks inside film canisters...

Hi!
Agree! Bend the tubing down slightly and find a thin wall silicon fuel hose. -It's all there is!

Hi!
Agree! Bend the tubing down slightly and find a thin wall silicon fuel hose. -It's all there is!

I just ran into one of my home made tanks I used for 1/2A two Ch. planes. These were just 2oz. shampoo bottles you find at hotels, long and narrow. I looked to see what I used and it was just a normal size clunk with thin walled fuel line. These little bottles worked great and the price was right.

Noveldoc,

Would that be 150, 165, 180, 210 grain? Just kidding!

A novel idea for sure!

Bob

P.S. People, he's talking about the bullet or tip only, not the entire cartridge! hehehe, I can see it now. [sm=omg_smile.gif]