Propane and Natural gas are both excellent fuels for engines. Both have higher octane than gasoline and would allow for very high compression and therefore efficient engines. In addition natural gas is the lowest in CO2 emissions of the fossil fuels. Propane has seen periods of popularity in tractors etc. however natural gas has not. The deal breaker for natural gas is that it remains a gas even at very high pressures, propane is easily converted to liquid. For example, at an ambient temperature of 100 degrees natural gas remains a gas 5000 psi, propane is a liquid and 190 psi at this temperature. Even at 5000 psi a tank of natural gas contains much less energy than a similar tank of liquid fuel, limiting the range or run time between fill ups. In addition equipment to handle the high pressures is costly. That's it in a nut shell.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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