MIL-DTL-46796D
Dry air density
0.0684 pounds per cubic feet (lb/ft3)
(1.0956 kilograms per cubic meter (kg/m3))
3.5.5 Torque. The observed torque at the engine flywheel, upon completion of the
break-in run with the full rack setting, shall be not less than the lb-ft shown below at 1800 rpm
using diesel fuel conforming to grade 4-D of ASTM D975 (see 4.6.10.5).
TYPE I
885 pounds feet (lb-ft) (1200 Newton-meters (N-m))
TYPE II
920 pounds feet (lb-ft) (1247 Newton-meters (N-m))
3.5.6 Exhaust smoke density. The exhaust smoke density, at full rack position, shall be
not more than the conditions as listed in table I or table II using diesel fuel conforming to grade
4-D of ASTM D975 (see 4.6.10.6).
TABLE I Exhaust smoke density.
Engine speed (rpm)
Meter number
Visual number
1000
6
3
1400
5
3
2600
4
1
NOTE: The meter reading number shall take precedence over the visual
reading.
TABLE II Visual exhaust smoke density classification.
Exhaust smoke description
Visual number
Clear
1
Haze
2
Light gray
3
Medium gray
4
Dark gray to black
5
3.5.7 Fuel consumption. The fuel consumption of the base engine shall not exceed the
limits specified in table III when operating at the full rack setting as specified in 3.5.4 using
diesel fuel conforming to grade 4-D of ASTM D975 (see 4.6.10.7).
TABLE III. Maximum observed brake specific fuel consumption.
Fuel consumption
Engine speed (rpm)
(lb per bhp hour)
TYPE I TYPE II
1400
0.44
------
1800
------
.370
2300
0.43
.380
6
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