Nitrogen Tire Inflation System Due to the fact that aircraft tires involve complex production procedures and are operated in severe conditions, the FAA, and a number of tire manufacturers recommend using nitrogen for inflation. Gentco has produced 20CU and 40CU nitrogen tire inflation systems that provide easy, cost effective solutions to the problem. The GKNAT20-TC is a 20 cubic foot high pressure nitrogen tank (supplied empty) with a stand, six foot hose, pressure reducing single stage regulator and a tire inflator with a dial pressure gauge that can be reset. The 40 cubic foot model has the same features of the smaller system. Nitrogen is a totally inert gas that will not support corrosion or oxidation in aircraft wheels and tires. Since compressed nitrogen has a larger gas molecule than compressed air, it inhibits tire pressure reduction. The two systems sell complete for $247 and $329. Accessory kits for people who already have a tank are only $144. Gentco systems can be ordered through Aircraft Spruce by calling 877-4-SPRUCE (overseas: 1.951.372.9555); or visit www.AircraftSpruce.com.