TRACTOR TESTING FROM THE USER'S STANDPOINT

Paper #:
  • 200028

Published:
  • 1920-01-01
DOI:
  • 10.4271/200028
Citation:
CHASE, L., "TRACTOR TESTING FROM THE USER'S STANDPOINT," SAE Technical Paper 200028, 1920, doi:10.4271/200028.
Author(s):
Pages:
10
Abstract:
To test tractors for results valuable to the user, the reliability, durability, power, economy and utility should be determined. Standard tests measuring tractor utility and reliability are impossible practically and durability tests would be an extensive project, but tractor and engine-power tests and tests of the amount of fuel required for doing a unit of work can easily be made.The University of Nebraska tests described were for belt and drawbar horsepower and miscellaneous testing for special cases. The four brake-horsepower tests adopted are stated. Tractor operating conditions are then reviewed. The drawbar horsepower tests include a 10-hr. test at the rated load of the tractor, with the governor set as in the first brake-horsepower test, and a series of short runs with the load increased for each until the engine is overloaded or the drive wheel slips excessively, to determine the maximum engine horsepower.The special testing course devised and constructed is described and the plans for absorbing the power of the tractor stated. In this connection the Nebraska dynamometer car which was developed for work at the University is described and its operation explained.
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