Additionally a car doesn't often need to run for a long time producing it's full rated power, except maybe a car in Germany or one that is racing. I always thought a lot of the low RPMs on tractor motors was so they could run at their rated power/RPM for hours on end without self destructing. Look at the evolution of gasoline tractors in the 50's and early 60's. Often the New model was the same basic engine as the previous model but had been tweaked to run at a higher RPM. We had a late model A John Deere, the engine in it was actually a little smaller displacement than the neighbor's model 60 but their 60 ran a but more RPMs. Look at Farmalls, what was the model H evolved into a 3 plow tractor while what was the the model C became a 2 plow tractor. More power, less displacement and more RPMs and gears. The 5.7 Hemi in my Ram truck makes horsepower and torque similar to the big block engines of my youth, but if I stomp on my Ram to pass something that tach jumps up to 4,000 RPMs or more pretty quick, it was a much longer journey to see 4,000 rpms in a Buick or Oldsmobile 455.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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