interesting post. Ive asked similar questions in the past but never got a reply. I asked if I check my car tyre pressure on the flat then re tested on a steep downhill would I get different readings. I think not but never bothered checking.

One reason to put Nitrogen in the light aircraft tyres as well, (I would always do so, if at all available) is the lack of moisture, compared to the compressed air.

and it lasts longer. F1 cars use it.

ladies 'n gents

Here's a link which gives some of the reasons fer usin' N in tires on high perf stuff like aircraft 'n such.

Happy Contrails! :)
k-o-t-s

http://www.nitrogendirect.com/N2Info.htm

Only if it is filtered and stored correctly. Just the same for compressed air. I fill my aircraft tyres from a SCUBA cylinder and I can assure you that the air is just as dry and filtered as it comes from my compressor which is quadruple filtered and used for mixing breathing gas.

Nitrogen has limited benefits in our spam can world, don't believe the hype otherwise.

Sorry Bosey thats plain wrong :=. Compressed nitrogen water content is just a few parts per billion, and will be considerably (ie more than 1000 times) lower than that of compressed air.

However, you're certainly correct that:

sorry MAriner but you are wrong. The water content is a direct result of the filtration method and is independent of the gas. Nitrogen does not hold more or less water than air. If you filter both gasses through the same stack the end result will be the same water content.

I run several gas blending stations in the UK and abroad and they are subject to rigorous testing. We also use Nitrogen, Helium, Oxygen as binary gasses for blending as well as plant supplied air for comparison testing and I can assure you that in the realm of commercial gas which we are discussing her the water content is the same.

You're entitled to your views Bosey :ok:

I once appeared as an expert witness in a case of high water content Methylene Chloride cargo. The "expert" on the other side suggested that the nitrogen used for purging may have had a high water content. He was laughed out of court....

Anyway, a somewhat pointless argument on here. The key fact relating to this thread is that we agree that N2 would have no real benefit for GA