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Old 05 September 2004, 15:32   #1
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Nitrogen filled pontoons!!

Hiya

Just wondering whether anybody has used nitrogen in their RIB's. Many tyre shops are offering free tyre fills with nitrogen.

Any ideas??

Regards
miles
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Old 05 September 2004, 15:52   #2
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As far as i can recall the only reason that they use nitrogen is because it does not get affected as much as normal "air" by heat. So it does not fluctuate in pressure as much as normal "air".

No idea what it would do in a RIB....

However, i think it was mainly due to the fact that the tyres have quite a bit of friction on the road (duh!) and could warm up..
I dont really see your RIB's tubes heating up from water....

Dont know if im right.. but i vagually recall something.
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Old 05 September 2004, 16:01   #3
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I'm not sure if it would be a good idea (or if it wouldn't, for that matter), but if what is said above is the sole difference, then it would be a good idea, as very hot weather could cause the normal air to expand, taking the pressure on the tubes too high.
I would be wary of the ammount of pressure the hoses can output though, remember they are designed to pump up a tyre with several tons of car sitting on top if it!

Dan
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Old 05 September 2004, 16:16   #4
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Surely you have 79% nitrogen in the tubes now ? whats going to change with 100% nitrogen ? and given that air is free....

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Old 05 September 2004, 18:33   #5
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And if you have pressure release valves, it's all going to vent out on a hot sunny day anyway.....

Maybe we should try Hydrogen and fly to the coast????

Mike C
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Old 05 September 2004, 18:36   #6
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Hmmm, Hydrogen eh?

You could run your engine off it! You would have two things at once!
A. It would float/fly and B. You would never have to worry about storing that emergency fuel can!

I'd fill mine with Carbon Dioxide, it would not burn as well!
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Old 05 September 2004, 21:45   #7
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I'd vote for Nitrous oxide filled tubes. If you sprung a leak you'd be laughing so hard you wouldn't care if you sunk.....Well you wouldn't care much about anything really!!!!
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Old 08 September 2004, 07:08   #8
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They started using Nitrogen in tyres because it is a more thermally stable than air and less likely to leak out because it has a larger molecular structure.

There is also a view that it is better for the tyre because without oxygen you get no oxidisation of the inner wall.

I am not sure that much of this applies to a rib tubes because hypolon is less permeable than rubber, having said that the thermal characteristics might to good.

Des
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Old 08 September 2004, 07:13   #9
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to be honest I thik Nitrogen filled pontoons would be veery interesting at low tide every Marina should have em
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Old 08 September 2004, 07:30   #10
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Quote:
Originally Posted by Rogue Wave
to be honest I thik Nitrogen filled pontoons would be veery interesting at low tide every Marina should have em
I think this is a classic case of ‘two nations divided by a common language’ American may speak English but they don’t understand it and they keep using the wrong word.

In the US a pontoon is a dock and a bum bag is a fanny pack and I have no idea what a tush is.

Des
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