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|  MIL-T-46765(AT)
6.3 Performance prediction. SAE Truck Ability Prediction Procedure computations and
computations for low speed and maximum geared speed will be required by the contract. The
SAE Work Sheet Item 1 should include vehicle model number, engine model number, and
vehicle type and class. Unless other conditions are cited in the contract computations should be
made for normal atmospheric pressure, normal ambient air temperature, and still, dry air. The
factors to be used in predicting truck ability (see 3.3.1) are established as follows for the
corresponding SAE Truck Ability Prediction Procedure Tables:
Table 1
- Tire Factor. This factor must relate to the size of tires
furnished by the contractor in accordance with this
specification.
Table 2
- Altitude factor. 1.00
Table 3
- Rolling Factor. 1.613
Table 4
- Area Factor. 0.173
Table 5
- Velocity Factor. 250.0
Table 6
- Altitude Factor. 1.00
Table 7
- Chassis Friction Horsepower. Use applicable power unit
GVW (to nearest, higher, tabulated 4540 kg
(1,000 pounds)) and the engine rpm which is required for
80 km/h (50 mph) geared speed. For GVW and engine
speed beyond the range of this table, factors shall be
extrapolated.
Table 8
- Grade Factor. 0.75
Table 8A
- Correction Factor. Not required.
Table 9
- Road Factor. 0.0.
*
6.4 Subject term (key word) listing.
Eductor
Nontactical truck
Truck, commercial
Truck, dump type
Truck, sewage and waste
Truck tank
4x2
6x4
6.5 Changes from previous issue. The margins of this specification are marked with
asterisks (*) to indicate where changes (additions, modifications, corrections, deletions) from the
previous issue were made. This was done as a convenience only and the Government assumes
no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are
cautioned to evaluate the requirements of this document based on the entire content regardless of
the marginal notations and relationship to the last previous issue.
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