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HomeAircraftHelicopterThunder TigerOther › Header & Main Tank Clunk Line
03-31-2005 12:45 AM  13 years agoPost 1
mcoccia

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Central Jersey

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Hi,

Are we using the small diameter fuel line for the clunk lines.


Thanks again
Mark

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03-31-2005 12:49 AM  13 years agoPost 2
Al Magaloff

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Some of we use the Prather high nitro medium line for ALL the lines. Others of we use the Hayes black clunk line. I don't like the small lines, because in time,they split at the fittings.

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03-31-2005 12:53 AM  13 years agoPost 3
mcoccia

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Central Jersey

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Al,

Thank you. I had used the small line but it was a BEAR to get onto the nipples. Should I change them again to the med line then or just leave them for now until the next gallon?


Thanks again
mark

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03-31-2005 12:56 AM  13 years agoPost 4
Al Magaloff

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I would change them to the medium stuff. It will split , and your flying day will end.

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03-31-2005 12:58 AM  13 years agoPost 5
brian2kgt

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Mt. Pleasant, PA

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How flexible is the Prather medium? Do you need to use a heavier clunk with it?

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03-31-2005 01:00 AM  13 years agoPost 6
mcoccia

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Central Jersey

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Thank you again AL.

I will change them right over.


Mark

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03-31-2005 01:03 AM  13 years agoPost 7
Al Magaloff

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You're welcome Mark! Brian, the Prather stuff is a little stiff out of the box, but breaks in nicely once it gets wet. I usually use the Min Air clunks, because I like them, but don't see a need for heavier. I run the UniFlow plumbing , and can empty every drop from the main tank, on all my machines.

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03-31-2005 01:14 AM  13 years agoPost 8
mcoccia

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Central Jersey

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Al,

What is the Uniflow system? I have heard this term before but I do not recall where I saw it.


Mark

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03-31-2005 02:05 AM  13 years agoPost 9
AMainMaker

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Nappanee,IN

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I use the black hayes tubing on the inside of all my tanks. On the outside linesI use General silicones med tubing. They have some cool colors to coordinate wiht the heli paint scheme
Jason

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03-31-2005 03:03 AM  13 years agoPost 10
Ace Dude

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USA

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I use Prather medium and the K&S heavy clunks. Sullivan makes a nice big heavy clunk, but it's too large to get into the tank opening on the Evo.

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03-31-2005 08:23 AM  13 years agoPost 11
mcoccia

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Central Jersey

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Al,

I just changed over to the Med line my in my header tank. Because the Med Pranther line is stiff the clunk sits at 1/2 the distance between full and empty. Will this change once the header tank is full? This did not happen with the main tank because the line is longer allowing the weight of clunk to hang to the bottom.


Thanks again
Mark

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03-31-2005 09:29 AM  13 years agoPost 12
Al Magaloff

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Mark. the line gets better, when it gets wet a few times. On my header tanks, I don't run the klunk line long enough so as to be able to drain all the fuel from the header.

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03-31-2005 10:36 AM  13 years agoPost 13
mcoccia

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Central Jersey

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Thanks again AL

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03-31-2005 07:22 PM  13 years agoPost 14
tech1

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Mississauga

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My engine has not run properly from the start. I could never get high revs without bogging down the engine. But it would fly fine as long as I take it easy on the sticks. Once I drain to the header tank, the fuel setting would change to rich.

Finally I got around to taking apart the tanks and found a large piece of flashing in the elbow joint for the main tank.

Flew out a tank today and everything is OK.


This would make the second time in about 10 years where debris has cause me a fuel system problem.

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03-31-2005 11:14 PM  13 years agoPost 15
Al Magaloff

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Yup! That flashing has caused many to scratch their heads. The header tank nipples also should be carefully looked at for the same issue.

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04-01-2005 12:17 AM  13 years agoPost 16
nojohnny101

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10 miles north of Cincy, OHIO

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hey
just an inexperienced questions here: what's flashing???


Thanks
~Will~

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04-01-2005 12:29 AM  13 years agoPost 17
Al Magaloff

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I think it has to do with walking around without underwear, and wearing a raincoat!

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04-01-2005 12:49 AM  13 years agoPost 18
nojohnny101

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10 miles north of Cincy, OHIO

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hey
hahaha... that's what i thought...just wanted to make sure

Thanks
~Will~

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04-01-2005 01:09 AM  13 years agoPost 19
mcoccia

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Central Jersey

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Al,

I ran with the new header tank fuel line today. Thanks for your help again.


Mark

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04-01-2005 05:32 AM  13 years agoPost 20
Al Magaloff

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Will, flash is the stuff left at the parting line when molds come together during the molding process. You'll notice the tank has a seam around the middle, where the two halves of the mold come together, often leaving excess material at the seam( parting line). This extra material is known as flashing(flash).

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