A big tractor becomes a fuel-hog when used at low power. That because an engine only runs efficently within a certain load-range. A 140 horse tractor used to do a 20 horsepower job will use more fuel than an old 8N Ford gas tractor. That's why tractors need to be sized for the work they do to be efficient.
For example, a Deere 7220 with a 414 turbo-diesel when worked at 104 horsepower has an efficiency rating of 18 horsepower hours per gallon. When worked at 44 horsepower efficiency drops to 11. When worked at 22 horsepower efficiency drops to 7 horsepower hours per gallon. And old Ford 8N with a flathead gas engine when worked at 22 horsepower has an efficiency of 9.6 horsepower hours per gallon - beating the modern Deere diesel.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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