MIL-T-45379D(AT)
TABLE II. Maximum acceptable level for continuous noise.
Octave band center Frequency (Hz) |
Maximum acceptable noise level (db ref. 0.0002 microbar) |
63 125 250 500 1000 2000 4000 8000 |
121 111 103 102 100 100 100 100 |
3.3.10.2 Operator's protection. Noise hazard caution signs shall be posted in all crew stations. The signs shall be clearly visible to all personnel (see 4.6.2.10).
3.3.11 Hull.
3.3.11.1 Cooling system. With the vehicle operating in an ambient temperature of 115°F, the engine oil temperature shall not exceed 250°F at the heat exchanger outlet, and the transmission oil temperature shall not exceed 300°F at the heat exchanger inlet (see 4.6.2.11.1 and 4.7.1).
3.3.12 Fuel system.
3.3.12.1 Fuel tanks, and lines cleanliness. Provisions shall be made to assure the internal cleanliness of the fuel tanks and lines prior to initial fueling of vehicle. The fuel tanks shall be free from leakage (see 4.6.2.12.1).
3.3.12.2 Heater fuel feed. With either of the fuel system pumps and the heater pump operating, the vehicle fuel system shall produce a pressure not less than 7 pounds per square inch (psi) at the outlet of the heater pump line (see 4.6.2.12.2).
3.3.12.3 Fuel shutoff valve. The engine shall stop firing and rotating within 30 seconds after the manual fuel shut-off valve is actuated to the OFF position (see 4.6.2.12.3)
3.3.12.4 Fuel system (slope). During engine operation, the fuel system shall maintain fuel supply to the engine when ascending and descending 60 percent grades in forward and reverse gear, and when the vehicle is being operated on 30 percent side slopes, with either side of the vehicle up slope (see 4.6.2.12.4).
3.3.12.5 Fuel tank (rapid fill). The fuel tanks shall be capable of receiving 50 gallons of fuel per minute (see 4.6.2.12.5).
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