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|  MIL-T-62255C(AT)
6.2 Ordering data. Purchaser should exercise any desired options offered herein, and
procurement documents should specify the following:
a. Title, number and date of this specification.
b. Identification of appropriate service for painting and marking, if other than required
(see 3.1.1.1.1).
c. Concealed marking, if required (see 3.1.1.1.1(b)).
d. Vehicles supplied to foreign nations, if required (see 3.1.1.1.1(c)).
e. Rear mounted pintle assembly, if required (see 3.1.1.5.1).
f. Electromagnetic interference (EMI) suppression, if required (see 3.1.1.6).
g. Arctic provisions, if required (see 3.1.1.10).
h. Blackout lights, if required (see 3.4.2.5.7).
i. Fifth wheel, 16 inch elevating, if not required (see 3.5).
j. Fifth wheel elevating 31 inches, if required (see 3.5.5).
6.2.1 Data requirements. Data requirements incorporated in DD Form 1423 shall be as
specified on Data Item Description Form DD Form 1664 and delivered in accordance with the
approved contract data requirements list DD Form 1423. Copies of data item descriptions
required by the contractors in connection with specific procurement functions should be obtained
from the procuring activity or as directed by the contracting officer.
6.3 Performance prediction. Completed copies of SAE Truck Ability Prediction Procedure
form and computation for all speed requirements for the vehicle model furnished under contract
should be submitted as specified in the contract. The SAE Work Sheet Item should include
vehicle model number, wheel base, engine model number, transmission model number and rear
axle model and vehicle type. 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 3.3.1.1) 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. 0.501
Table 4. Area factor. 0.261.
Table 5. Velocity factor. 16.0
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