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HomeAircraftHelicopterSynergy R/CSynergy N9 › N9 Fuel tank / Clunk Line Question
01-14-2009 02:49 AM  9 years agoPost 1
cation3

rrApprentice

Smyrna, GA - USA

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I have measured the clunk line according to the manual and I think it may be a bit short. Look at these pics. To the back of the tank it falls short, but it will curl into the forward corner fine without binding. This is Hayes line, which expands once nitro-fied. 20 tanks into my N9 lifetime - do I need to extend it???

From the side:

From above, bottom of pic = forward:

Thanks,
-Drew

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01-14-2009 02:59 AM  9 years agoPost 2
baddynergy

rrElite Veteran

sierra madre, ca- usa

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If it hasnt had fuel in the line it should be good. I usually soak mine in 30% for a couple hours before cutting to length. I would put fuel in the tank over night then drain it and see how it looks. It should grow about 1/4" maybe a little more.

**Unattended children will be givin a shot of espresso and a puppy**

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01-14-2009 03:16 AM  9 years agoPost 3
cation3

rrApprentice

Smyrna, GA - USA

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Actually, I have done the engine break-in with this fuel line. It has had twenty tanks through it. The Hayes line will probably not extend anymore. Just a little scared as to a late-flight vertical climb and the fuel magnet coming out of the fuel....

-Drew

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01-14-2009 03:20 AM  9 years agoPost 4
baddynergy

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sierra madre, ca- usa

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In that case, I would cut a longer one. You want the magnet just off the back of the tank.

**Unattended children will be givin a shot of espresso and a puppy**

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01-14-2009 03:27 AM  9 years agoPost 5
cation3

rrApprentice

Smyrna, GA - USA

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That is what I thought I needed to hear.

Thanks,
-Drew

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01-14-2009 07:11 AM  9 years agoPost 6
HiroboFreak

rrVeteran

Central Coast, NSW, Australia

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The manual states to cut the clunk line to 60mm.

This will place the clunk basically in the centre of the tank.

The fuel magnet works differently to a normal clunk. A normal clunk needs to be submerged in fuel at all times to eliminate bubbles.
A fuel magnet is of course a sponge which soaks up fuel at anytime that the fuel passes by it, therefore can pretty much suck a tank dry, unlike a normal clunk.
Having it fall in the centre of the tank is probably the optimum position.

I've had mine as per the manual running a fuel magnet for over 2 years & never had a problem.

You have done the right thing by following the manual.

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