MIL-DTL-10215M
TABLE II. Performance requirements.
Verification
Part
Requirements
Drive shaft
Observed readings at =>
77 ºF
160 ºF
Speedometer
speed
(rpm)
(mph)
167
10
+1 to -1
+4 to -4
500
30
+2 to -1
+5 to -4
1,000
60
+3 to -0
+6 to -3
Pointers shall leave the stop at or before the drive shaft reaches a speed
that equates to 3 mph
Pointers shall be damped to prevent an oscillation of more than ±0.5 mph above
10 mph when operated directly off a drive shaft with no fluctuation in speed
Drive shaft
Observed readings at =>
77 ºF
160 ºF
Tachometer
speed
(rpm)
(rpm)
250
500
±60
±110
1000
2000
±60
±110
1500
3000
±60
±110
Pointers shall leave the stop at or before the drive shaft reaches a speed
that equates to 100 rpm
Pointers shall be damped to prevent an oscillation of more than ±30 rpm above
500 rpm when operated directly off a drive shaft with no fluctuation in speed
Odometer
Readings shall be accurate within ± 1% of actual mileage
Engine Hour
Readings shall be accurate within ± 2% of actual elapsed time
Meter
Flexible shaft
10 minutes of operation at 35 mph during which time the speedometer s pointer
assembly,
core assembly
shall not exceed ±2 mph in oscillation
and adapter
8
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