Propane has less energy per gallon as compared to diesel or gas. Propane engine is also less efficient. So - propane is more expensive to run unless you live somewhere that's it's abnormally cheap (as compared to the US average).
Where I live in central NY our school almost wasted a ton of money on new propane school buses that were going to cost near twice per mile that the diesels did. That was when propane was $3.20 per gallon and diesel was $4 per galllon.
Right now - in central NY: $1 of propane buys 30,500 BTUs of energy $1 of gasoline buys 31,754 BTUs of energy $1 of diesel (at the pump) buys 32,500 BTUs $1 of farm diesel buys 37,249 BTUs of energy
The new school buses our school district looked at came in diesel versions rated at 7-8 MPG and propane rated at 4-5 MPG. The math is pretty plain.
With farm tractors? Look at Nebraska tests. Propane tractors are the lowest efficiency. Rated by horsepower-hours-per-gallon. The lower the number the more of fuel-pig the tractor is.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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