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HelicopterAlignOther › Fueling tank tube problem
08-12-2007 05:43 PM  10 years agoPost 1
charliedoane

rrApprentice

Branford, CT USA

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The fueling tube inside the main tank split and fell off the nipple during flight and needed to autorotation the heli in. I’ve been only flying a year and have been practicing my auto’s on the simulator a little on the trex600. Good thing I did. I have a header tank but can see the fuel level and I always visually check the main tank during flight. The header tank was empty and the main tank was half full. I replaced the tube with a spare one I had. Has anyone had this happen to them?

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08-12-2007 06:11 PM  10 years agoPost 2
drummer5140

rrNovice

Vancouver, canada

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Fueling tank tube problem

The same thing happend to me last week, I had a flame out auto no problem. Anyway the Align fuel tubeung sucks. Mine was 1 month old 9 gallons of fuel and it split as well. Long story short if your useing the CHEAP Align fuel tube do your self good and deep 6 it and get real fuel tube.

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08-12-2007 06:47 PM  10 years agoPost 3
MJWS

rrKey Veteran

Airdrie, AB - Canada

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There are half a dozen threads on this. The stock clunk line splits. Unfortunately it looks pretty good when new so people try it. A few have been able to make it last by filling their tanks to keep it out of the fumes.

Mike

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08-12-2007 07:09 PM  10 years agoPost 4
ringram2077

rrApprentice

Birmingham, AL

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I don't think the Align fuel tubing is cheap rather it is just thin wall. This makes it very flexible which is great for letting the clunk move freely. The thin wall will not hold up as long as the thicker wall (and stiffer) fuel line. The nitro and exhaust fumes work on it all though. I have been able to get buy without a header tank or a fuel magnet so far. Not sure I could with a larger diameter clunk line. Forced autos are great when they work out well but sometimes they don't.

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08-13-2007 04:48 AM  10 years agoPost 5
drdot

rrElite Veteran

So. California,​Orange County.

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fwiw...

Best to get in the habit of changing the tank tube every six months,,,Cheap insurance...

John.

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08-13-2007 05:01 AM  10 years agoPost 6
702nitro

rrKey Veteran

Las Vegas, NV

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Best to get in the habit of changing the tank tube every six months
Good practice but I think sooner. After 3 1/2 months of flying the Aerotrend (SM) line I use for the clunk really detioriarated and was hanging by a thread at the nipple. I'm suprised that my engine didn't quite at all during that time.

If you look at the pressure nipple its situated right above the clunk nipple. This means that all that high temperature exhaust fumes are directly hitting the fuel tubing as soon as it enters the tank. With that in mind, i'd say maybe every 2 months, or if you really fly alot maybe once a month.

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08-13-2007 07:39 AM  10 years agoPost 7
Tintin

rrVeteran

Akershus, Norway

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I just checked my about 1 year old standard clunk line in my Raptor as I've read so meny posts about this problem on the Raptor and now on the TRex.

It was in perfect condition, still. I bent and pulled, but as I said, still perfect. I wonder what makes the difference?
I always run the tank empty (or pump it empty) and then crank the engine till it does not ignite.

I'll keep checking, but so far I've never had any fuel line fail me of any kind.

“Getting an inch of snow is like winning 10 cents in the lottery.”

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HelicopterAlignOther › Fueling tank tube problem
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