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11-07-2013 02:58 AM  4 years agoPost 1
Rob43

rrKey Veteran

Midland, MI USA

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I just installed Hayes clunk lines in a new X50 build. They don't seem as flexy as the thinner stock tubing. I don't recall if they develop some more flex with use. Is this the case?

Rob

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11-07-2013 04:49 AM  4 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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The thin stock tubing is like an overdone noodle. Very limp. But it also rots quickly.

Hayes 249 is stiffer, but works well.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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11-07-2013 12:54 PM  4 years agoPost 3
Four Stroker

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Atlanta

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The rot seems to be associated with exhaust pressure. Pumped engines don't have as much problem.

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11-07-2013 06:05 PM  4 years agoPost 4
Rob43

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Midland, MI USA

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I guess my real concern is when I tip the heli forward, as nose down, if I were say flying a nose down funnel for a couple of laps or more, the main tank clunk won't likely touch fuel after 1/2 a tank or so. I expect the header will keep the carb fed until I am out of that orientation and the main tank starts forwarding fuel again.

Rob

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11-07-2013 06:32 PM  4 years agoPost 5
Four Stroker

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Atlanta

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We had a young 3D guy who kept complaining: "How did all that air get in my header tank ?"

Tetra mades bladder tanks.

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11-07-2013 09:21 PM  4 years agoPost 6
datidun

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N Ireland

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Im using a thick wall tubing same as the outside tubing,i had to put in a much heaver clunk to make it touch upright and inverted,should last much longer,however i could not do this in the X50,it has a weird shape tank,so the the flexi stuff had to go in.

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11-08-2013 08:02 PM  4 years agoPost 7
Andy from Sandy

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Bedfordshire, UK

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On my X50 it is always using some fuel from the header tank. The clunk cannot get to all places and with a very soft clunk line it could well kink and restrict fuel flow.

I am going to try the Lynx Heli brand that is 6mm OD and 3mm ID which feels much more flexible than standard fuel line and not bad compared to the thin walled clunk line.

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11-09-2013 12:44 AM  4 years agoPost 8
Rob43

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Midland, MI USA

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It's fun to solve problems in advance, when the heli is still in the build stage, but, I would guess I won't have much trouble. I didn't pay this much attention to my fuel delivery system in my last two helis, and never had a problem. However, I fly considerably more aggressively since that time now, so, it should even out. LOL. Thanks to you guys for your thoughts.

Rob

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