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Engine starting on grades and slopes |
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|  MIL-C-62310A(AT)
3.6.5 Acceleration. With the vehicle at a standstill, transmission in 1-3 range, and engine at
idle speed, the vehicle shall accelerate from 0 to 20 mph in not more than 11 seconds.
3.6.6 Engine starting on grades and slopes. After vehicle has been standing on a 60 percent
grade for not less than 2 minutes with engine operating under no load between 750 and
1000 rpm, the engine shall be stopped for not less than one minute. The engine shall restart in
not more than one minute when vehicle is headed up or down a 60 degree grade. Similar engine
starting tests shall be conducted on 30 percent side slopes, with right and then left side of vehicle
up-slope.
3.6.7 Braking.
3.6.7.1 Stopping and vehicle control. Vehicle shall stop within a distance of 40 feet from
point of service brake application when traveling at a speed of 20 mph on smooth, level,
hard-surfaced roads free of loose material. Drift shall not exceed 3 feet in stopping distance.
During stopping, the vehicle being under driver's individual control, steering action is permitted.
3.6.7.2 Holding. With brakes locked for parking and with transmission in neutral, the
vehicle shall hold stationary when parked on a 60 percent longitudinal grade. For this operation
vehicle shall be loaded with rated payload.
3.6.8 Turning. Vehicle, on smooth, level, hard-surfaced road or track, with differential steer,
shall make continuous, full 360 degree turns to right and to left, with rear point of outer edge of
vehicle at all times in contact with or within a 50 foot diameter circle. When in pivot steer, the
vehicle shall pivot within a 28 foot diameter circle. The applied effort to the steering lever shall
not exceed 100 pounds to pivot vehicle.
3.6.9 Water crossing.
3.6.9.1 Leakage. During shallow water crossings and amphibious operation, leakage of
water into the hull shall be not more than one quart per minute.
3.6.9.2 Shallow water crossing. Vehicle shall ford shallow, hard-bottomed, salt or fresh
water channels up to the depth required to float vehicle.
3.6.9.3 Amphibious operation. Vehicle, launched amphibiously, shall negotiate water of
depth sufficient to float vehicle with height of waves not exceeding one foot. When afloat in
calm water, vehicle shall attain a maximum speed of not less than 3 mph. The vehicle shall
operate within a 30 foot corridor when crossing calm, open water.
3.6.10 Trench crossing. Vehicle shall cross trenches up to 36 inches in depth, and up to
66 inches in width, without damage to vehicle.
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