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Old 09-26-2014, 12:43 PM
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Discussion
Anyone use the black fuel line infuel tanks?

I was wondering if it holds up better than tygon to hardening?
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Old 09-26-2014, 12:46 PM
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I use Viton and it's black. It holds up better than anything I've used in the past. My setup is a Fourtitude tank with Viton and felt clunk, I use a Mcdonalds drink straw over the fuel tubing to keep it from curling. Been doing this on 3 or 4 different planes for the last 2 seasons with great results.
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Old 09-26-2014, 01:04 PM
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Yep, Viton and a felt clunk for me too.
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Old 09-26-2014, 01:38 PM
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The neoprene tubing doesn't hold up to the ethanol, Viton does. Both black. Be careful with what you buy.
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Old 09-26-2014, 02:04 PM
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Thanks for the info.
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Old 09-26-2014, 03:29 PM
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First year using it... They say it last two years before needing replace...
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Old 09-26-2014, 04:07 PM
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This is the stuff!

http://shop.redaerorc.com/Vitube-Hig...ng-VT-1000.htm

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Old 09-26-2014, 07:45 PM
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As a former (retired) rubber engineer, all I can say is VITON is what you should use inside the fuel tank.


Tygon is NOT rubber but a plastic compound with additives that are added to improve it flexibility (able to bend), BUT gasoline slowly removes these additives (Plasticizers) and that is why it hardens over time when left inside the fuel tank.


On the outside for the vent line, or to the carb, or as your input fuel line to the tank, Tygon is quite acceptable as the gas is not in constant contact with the tubing to cause the plasticizers to be leached out and quickly hardened it.


Neoprene which is also black is NOT a good substitute. It was designed for totally different types of applications.


Hope this helps!
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Old 09-27-2014, 07:13 AM
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I use TYGOTHANE. Gas proof, stays flexible over time and very cheap when bought formed supply house. I use it in and out of the tank.
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Old 09-27-2014, 08:56 AM
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^ FTW
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Old 09-27-2014, 10:02 AM
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Lol its ***
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Old 09-27-2014, 10:17 AM
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Sigh...really?
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as much as I hate to steer business away from the local RC guys....Viton at the RC stores is absurd in pricing.

I buy mine from here

http://www.dudadiesel.com/viton.php

They option of different sizes is a plus also
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Old 09-27-2014, 11:44 AM
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I tried some of the diesel tubing and it is way stiffer than the Viton that Red Aero sells. They say it is the same material, but it is definitely not the same flexibility.
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Old 09-28-2014, 07:42 AM
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"FTW" means?????????????
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Old 09-28-2014, 08:44 AM
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Quote:
Originally Posted by Texastbird View Post
I tried some of the diesel tubing and it is way stiffer than the Viton that Red Aero sells. They say it is the same material, but it is definitely not the same flexibility.
The Viton tubing is available in several grades of stiffness or durometer. The lower the number the more flexible it is. I purchase mine from McMaster Carr http://www.mcmaster.com/?error_redir...tubing/=tx3k31 It is more expensive than Tygon but it will never get hard and you really do not need more than a couple of inches for your tank. It my tanks I have a short piece of Viton attaching a felt clunk to a brass tube. Another section of Viton, about two inches long, attaches the brass tube to the fuel line fitting of the tank. This section acts as a flexible joint that allows the brass tube/felt clunk assembly flop around in the tank.
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