On Mon, 01 Aug 2016 13:48:30 -0700, Casey wrote:

Which I would try nitrogen to see if that held up better than air.
Maybe then only a **** of nitrogen once a year would be good.

Nitrogen is slightly lighter than oxygen so, to a first approximation,
should leak out a bit faster than air. However because nitrogen, unlike
air, doesn't degrade rubber, it may be preferable for this reason.

Either air or nitrogen will leak out a lot slower than helium, which
diffuses through solids three times faster than air. Only hydrogen has a
higher gaseous diffusion rate (154% of helium's rate).

However, when you take cost and availability at the airfield into
account, putting air into glider tyres may turn out to be the better
inflation method.


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martin@ | Martin Gregorie
gregorie. | Essex, UK
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