That's because the tax payer is buying the fuel! The M1A1 tank holds just over 500 gallons of fuel and has a range of 300 miles. The big thing that makes it great from the tank is light weight. Tanks are heavy because of the armor. When they first started development of the M1 their target weight was 40-45 tons. Then the Brits came up with new armor and the target weight went out the window. Crew survivability became very important. Plus add in the desired ground speeds they wanted to achieve. About the only option at the time was the turbine. A tractor needs weight to get better traction. The next problem is heat. Exhaust gas temps on the turbine engine are such that if you park a modern car right behind a tank, goose the throttle up to about 2500 RPMS it will melt the plastic and bubble the paint on the front of the car. So the exhaust would have to go up, not down and the air flow requires a large exhaust. A tractor in the 40 or so HP range would have an exhaust the size of a dinner plate. The size in the tank would be about the size of a 200 gallon fuel tank on a truck.
The other problem with a turbine in a vehicle is there is no engine braking at all. Take your foot off the gas and you have to use the brakes to slow down even just a couple of miles an hour.
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Today's Featured Article - The Rescue of a Fordson F - by Anthony West. Introduction I live in the UK and have for many years restored Fordson tractors (in the main model N's). I have also restored and shown model F's, E 27N's, Field Marshall Series 2, David Brown Cropmasters and the old rey Fergeson T 20. At one time I had seven restored examples which were shown and used in ploughing matches. As most restorers, I have a number of war stories I can relate on a range of topics that may help other like minded and interested people. Perhaps my first p
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