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|  MIL-T-62222(AT)
ranges when controls are applied to steer, stop, or hold vehicle. Each power plant shall be
checked prior to installation in the vehicle and the necessary engine and transmission
adjustments made to assure conformity to vehicle mobility and related engine requirements
(see 4.6.17.2).
3.5.2.1 Speeds.
3.5.2.1.1 Level road speeds. The vehicle shall operate at sustained speeds of 30 mph and at
2.5 mph on level ground without damage to power plant and power train. When traveling
between 25 and 30 mph in a straight line, without manual steer correction, the vehicle drift shall
not exceed three feet in 100 feet (see 4.6.17.2.1.1).
3.5.2.1.2 Grade speeds. The vehicle shall operate at a sustained speed of 10 mph
while ascending a 10 percent grade, and at 20 mph while ascending a 3 percent grade
(see 4.6.17.2.1.2).
3.5.2.2 Acceleration. The vehicle shall accelerate from a standing start on level ground
through a distance of 200 feet within a time period of 13 seconds (see 4.6.17.2.2).
3.5.2.3 Climbing. The vehicle shall ascend longitudinal grades of 60 percent in forward and
reverse gear without stalling or damage to the power plant and power train. The vehicle shall
operate on right and left side slopes of 30 percent (see 4.6.17.2.3).
3.5.2.4 Engine start on grades and slopes. When standing on a 60 percent grade for not less
than two minutes, with engine idling under no load between 700 and 750 rpm, the engine shall
be stopped for not less than two minutes. The engine shall restart in not more than one minute
when headed either up or down grade. A similar engine stopping and starting test shall
be accomplished on 30 percent right and left side slopes (see 4.6.17.2.4).
3.5.2.5 Braking and drift. The vehicle traveling at 20 mph shall stop within 60 feet from the
point of brake application, drift shall no exceed four feet when stopping (see 4.6.17.2.5).
3.5.2.5.1 Holding. With the vehicle standing on a 60 percent grade with the service brakes
applied, the vehicle shall be held stationary when headed either up or down grade. With the
parking brake engaged and all other holding devices inoperative, the vehicle shall be held
stationary when headed either up or down grade (see 4.6.17.2.5.1).
3.5.2.6 Turning. The vehicle shall turn 360 degrees to the right and left in pivot, in neutral
steer, within a circle 35 feet in diameter (see 4.6.17.2.6).
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