Back 50-55 years ago mowing hay with Dad's worn-out Oliver sickle mower behind the 1939 H the mower ran at 540+ RPM all the time to get the mph. In '68 with the stage II Super H I ran around 1500 engine rpm, 490-500 pto rpm, which was just shy of 6 mph in 4th.
Some jobs I got hollared at for NOT running wide open, and the jobs I did run wide open I never heard a complaint.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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