The procedure has been developed to provide a practical methodfor the prediction of truck performance using accepted data. It Isdesigned to help anyone concerned with the problem of truckselection.

By following directions, it is possible to determine thenecessary information for intelligent truck selection without beingconcerned with the origin or derivation of the complex factorsinvolved. With readily available specification of a truck,information provided in the tables, and minimum of calculation, itis possible to predict:

(a) The performance obtainable from a truck of givencharacteristics under given operating conditions. (b) Thecharacteristics required in a truck to meet different performancerequirements under given operating conditions.

This report comprises a procedure form and 10 tables of data. Acomplete explanation of the truck ability prediction procedure iscontained in SAE Technical Report HS-82, Truck Ability PredictionProcedure.ty prediction procedure is contained in SAE TechnicalReport HS-82, Truck Ability Prediction Procedure. Part 1 of HS-82contains, in addition to the procedure form and tables, work sheetsans an example. Part 2 demonstrates by practical examples how toobtain some of the answers other than grade ability, and presents adetailed procedure for computing instantaneous acceleration and thetime or distance required to accelerate between specified limits ofspeed. Part 3 gives terminology, the fundamental relations, and theformulas which form the basis for the procedure, a discussion of threliability of factors and methods, and presents a method forevaluating the effect of wind on air resistance.