MIL-DTL-62177E
DETAIL SPECIFICATION
ENGINE, DIESEL: 12 CYLINDER, 90° V-TYPE, 750HP, AVDS1790-2, AVDS1790-2A, AVDS1790-2C, AVDS1790-2D, AVDS1790-2DR, AVDS1790-2CA AND AVDS1790-2DA
MIL-DTL-62177E - Page 22 of 26
MIL-DTL-62177E
22
Electrical loading
Endurance
hours
-2, -2A, -2D, -2DR or -2DA engine
-2C or -2CA engine
0-100
101-200
201-300
301-400
100
±
10 A
200
±
10 A
200
±
10 A
300
±
10 A
300
±
10 A
400
±
10 A
500
±
10 A
650
±
10 A
4.6.4.2
Borescope inspection.
To determine conformance to 3.5.4, the engine shall be
borescope inspected and the condition of the cylinders recorded.
4.6.5
Operating environment requirements verification.
4.6.5.1
Extreme temperature starting ability.
To determine conformance to 3.6.1, the
engine shall be subjected to the following tests:
a.
The engine shall be cold-soaked to an ambient temperature of -25
°
F.
Then,
without external aids or benefit of solar radiation, the engine shall be started.
b.
The engine shall be cold-soaked to an ambient temperature of -65
°
F with the
winterization kit preheating the cold-soaked batteries and lubricating oil to
-25
°
F).
Then the engine shall be started.
c.
The engine shall be operated at the full power setting and at an ambient
temperature of 115
°
F with exposure to maximum solar radiation until the
lubricating oil reaches the maximum attainable temperature up to 250
°
F measured
at the main oil gallery (oil cooler outlet).
Then the engine shall be stopped, and
restarted.
4.6.5.2
High temperature operation.
To determine conformance to 3.6.2, the engine shall
be operated at the maximum GCBHP (see table I) with a maximum air inlet temperature of
115
°
F.
The lubricating oil temperature shall be measured at the main oil gallery (oil cooler
outlet), and the exhaust gas temperature at each cylinder port.
4.6.5.3
Low pressure.
To determine conformance to 3.6.3, the engine shall be operated
at the following ambient conditions:
Elevation
ft (m)
Pressure
in. of Hg (cm of Hg)
Temperature
3000 (914)
4000 (1219)
5000 (1524)
6000 (1829)
7000 (2134)
8000 (2438)
26.8 (68.1)
25.8 (65.5)
24.9 (63.2)
24.0 (61)
23.1 (58.7)
22.2 (56.4)
115
°
F
108
°
F (42
°
C)
100
°
F
97
°
F (36
°
C)
93
°
F (34
°
C)
90
°
F (32
°
C)
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