Dave763

My Feedback: (1)

In a glow engine the flexibilty of silicone tubing allows the clunk to "flop" around in the tank. I am setting up my first gasser, and the tygon (F-4040-A) is so stiff that the clunk only move's around the rear of the tank, and never flops foward. What's the story? It seems it would suck a big air bubble into the carb line. I plan on using a felt clunk on the pickup line. I had a piece of Saint Gobain flexible tygon, (P-1000) very flexible until I soaked a piece in some Gas overnight. Then it became stiff and discolored. I got it off a gas fueling system so I thought(thats what I get for thinking)it would be ok.How are you guys setting up your tanks?I was planning a three line system,fill/drain,vent,and the pickup.The pickup line is the only thing I'm worried about.

Rodney

You don't want the clunk to go forward, as long as it is going up/down and side to side at the rear of the tank, you will be fine.

Dave763

My Feedback: (1)

OK, the clunk moves around the rear of the tank. I'll set it up with the tygon line and see what happens!

dod2005

My Feedback: (2)

I was getting ready to post a new thread and saw this post and it answered one of my questions. My other question is concerning line size. I'm setting up a 30% Edge with a 3W75. Do I need large inner diameter tubing? I set the tank up with it's supplied hardware (medium tubing) and ran same size line to the carb. Will this provide enough fuel?

Thanks in advance

iwannafly

My Feedback: (1)

Get some of the black neophrene tubing for the clunk. Much more flex than the tygon. I believe the larger line is only needed if the tank hardware is of the larger size.

bentgear

If the clunk ever moves forward in the tank it will stick forward. Guaranteed dead stick. In fact if you ever have a hard nose over type landing always check the clunk to make sure it is not stuck forward before the next flight.
Ed M.