Engine starting on grades and slopes test

Page Title: Engine starting on grades and slopes test
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MIL-C-62310A(AT)

4.7.19 Bilge pumps test. To determine conformance to 3.6.3, the vehicle shall have

sufficient water in hull to measure bilge pumps operation. Rate of water removal, and discharge

head shall be measured.

4.7.20 Speeds and vehicle control test. To determine conformance to 3.6.4, vehicle shall be

driven at speeds from 2 to 3 mph for not less than 5 minutes and at specified speeds thereafter on

smooth level hard surfaces, and performance observed.

4.7.21 Acceleration test. To determine conformance to 3.6.5, the vehicle shall be operated

as specified on smooth level hard surfaces and acceleration measured.

4.7.22 Engine starting on grades and slopes test. To determine conformance to 3.6.6, the

vehicle shall be driven up a 60 percent grade, engine stopped for not less than specified time and

restarted. Vehicle shall then be operated on 30 percent side slopes and engine stopped for not

less than specified time, then restarted.

4.7.23 Stopping and vehicle control test. To determine conformance to 3.6.7.1, the vehicle

shall be driven at specified speed. Three stops shall be made and the results shall be averaged to

determine acceptance.

4.7.24 Holding test. To determine conformance to 3.6.7.2, the vehicle shall be driven up the

specified grade, brakes applied and vehicle observed for movement. Then, with brakes locked

for parking, the vehicle shall again be observed for movement. During this test vehicle shall be

combat loaded, or with a simulated load of equal weight placed in a position that will not restrict

the flow of engine air (intake or exhaust).

4.7.25 Turning test. To determine conformance to 3.6.8, the vehicle shall be operated as

specified, turned to the right and left in full 360 degree turns and performance observed.

4.7.26 Shallow water fording and floatation test. To determine conformance to 3.6.9.1 and

3.6.9.2, the vehicle shall be driven into water of specified depth without special equipment.

Water accumulation shall not exceed specified amount after 15 minutes of test.

4.7.27 Amphibious operation test. To determine conformance to 3.4.1 and 3.6.9.3, the

vehicle shall be loaded with rated payload, operated amphibiously and performance observed.

The amount of water in the hull and leakage of lubricants from the bearings shall be measured.

4.7.28 Trench crossing test. To determine conformance to 3.6.10, the vehicle shall be

operated over trenches of specified depth and width.

4.7.29 Vertical obstacle test. To determine conformance to 3.6.11, the vehicle shall be

operated over vertical obstacles of specified height.

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