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Home✈️Aircraft🚁HelicopterThunder TigerRAPTOR 50 › Which Clunk Line Tubing?
08-22-2008 07:36 PM  12 years ago
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Skarn

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Pasadena, MD

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Which Clunk Line Tubing?
Hey all,

I think I finally figured out my engine troubles....long story, but my OS 50 kept cutting out when giving full throttle. I checked everything and all seemed fine.

Well, I had a similar problem a couple months ago and replaced the clunk line in my header tank and all is fine. That's when it hit me. I bought the Raptor used...it had a VERY soft/flexible black line which I'm sure worked great at one point. But with age, I'm guessing it's weakened like any line/hose does with age. I figured out that at idle, my engine ran fine.....but when giving throttle, the suction created was enough to actually collapse the flexible black clunk line causing it to shut off immediately! I've put standard silicone fuel tubing in for now and it seems ok.

But the question is: Do you guys have a preference for your clunk lines or am I ok using standard fuel tubing?

Thanks!
Skarn
It's better to burn out than to fade away...
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08-22-2008 07:48 PM  12 years ago
jsenicka

rrProfessor

Eagle River, WI

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I use Dubro medium fuel line.
Hayes is decent (flexible black) but it does stretch some and you need to cut it to correct length.

I gave up fooling with it and just change the clunk line with regular fuel line on my 50's every 30 talks or so
Jim Senicka
Team Manager, GrandRC Flight Team
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08-22-2008 09:17 PM  12 years ago
Skarn

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Pasadena, MD

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I'm guessing that the Haye's must be what was on it when I got it. You say it's decent, but so far, it's caused me nothing but issues! It just seems TOO flexible...

Thanks for the reply,
Skarn
It's better to burn out than to fade away...
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08-22-2008 09:21 PM  12 years ago
Dood

rrProfessor

Wescanson

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What he means by "decent" when he refers to Hayes line, he means its the BEST clunk line.

Yes, you want it to be flexible. If the clunk line isn't flexible, it can't do it's job. It needs to be able to move around the tank.
The Hayes line also won't kink. Thats extremely important.
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Home✈️Aircraft🚁HelicopterThunder TigerRAPTOR 50 › Which Clunk Line Tubing?
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