THIS report of the Tractor Test Codes Subcommittee of the CIMTC consists of separate papers by various members of the subcommittee.
The need for a tractor test code and the objectives of this code are covered in one paper included here. Another paper discussing the instrumentation used in the tests is based on reports about the ERDL dynamometer truck, the Good-year dynamometer truck, and the Allis-Chalmers dynamometer equipment.
An evaluation of field-test results, discussed in another paper of this report, indicates that there is general accuracy and correlation among the three types of measuring equipment and that the accuracy tolerances given in the code can be met.
The test codes for reserve tractive ability and vehicle drag are also given here.