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  • All fields: RPM)
(8 results)



Display: 20

    • Nebraska Tractor Test Laboratory, Records

    • Farm tractors--Testing; Tractors--Testing; Caterpillar Inc.
    • Text states: "1940. Checking engine R.P.M. during test no. 357." The Caterpillar D-8 is shown from the rear, where the belt pulley is located. A test engineer is measuring the belt pulley RPM with a handheld Tachometer (an RPM counter) touching...
    • Nebraska Tractor Test Laboratory, Records

    • Farm tractors--Testing; Massey-Harris tractors; Massey-Harris Company
    • Test no. 401. Massey-Harris Pony. R. Valentine, H. Hartz, E. Dahl (Factory Rep), H. Mizner, V. Hitt. behind the Massey-Harris Pony tractor inside the tractor test lab. Note the RPM Counter on the front of the tractor and the time clock on the...
    • Nebraska Tractor Test Laboratory, Records

    • Farm tractors--Testing; Dynamometer; Equipment
    • Dynamometer Contol panel for the large Westinghouse DC dynamometer. The image shows the dynamometer controls on the right; a scale dial (reading provides torque when it is multiplied by torque arm) On the left there are the various revolution...
    • Nebraska Tractor Test Laboratory, Records

    • Tractors--Testing; Equipment
    • Instrumentation in the Oliver tractor test car. The large left gage is for measuring low drawbar load forces, the right one is for large loads. The valves are vibration damping valves. Various gages counters and switches are used for engine rpm,...
    • Larsen Tractor Museum, Records

    • Hart-Parr Tractor Co.; Hart-Parr tractors
    • "Mr. Charles Parr and one of the early Hart-Parr tractors. This tractor was built as early as 1906, and was called the Hart-Parr plow gear tractor. It was a 2 cylinder 10x15 inch engine developing approximately 62 belt horsepower at 300 RPM. The...
    • Larsen Tractor Museum, Records

    • Moline Universal tractors
    • "1917 Moline Universal tractor. One of the first universal tool carriers, it could be outfitted with sulky, plow, cultivators, planters, drills. Engine was high speed (1400 RPM), for those days, 4 cylinders with electric starter, electric...

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