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Page Title:
Ambient Temperature Operating Ranqe |
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|  MIL-S-19557/10A(AS)
REQUIREMENTS (cont'd)
Applicable paragraphs
of MIL-S-19557C(AS)
Ambient Temperature Operating Ranqe: -40 to +125F
3.3.2
External Surface Temperature: 400F MAXIMUM
3.3.2
The maximum external surface or skin temperature
shall not be exceeded during or following any starter
operating condition. An external covering or
insulating blanket(s) may be provided to satisfy this
requirement.
Reliability: Specified mean time between failures
3.4.1
shall be 5600 operating hours.
Maintainability: No scheduled or unscheduled
3.4.2
maintenance shall be required as a result of starter
design or quality for a minimum period of 3000
overrunning hours.
3.3.2.3
Control Valve:
4.5.1.1
Opening Rate, Max: 15 5 psig per sec.
4.5.6
Opening Time, Max: 5.0 sec.
Closing Time, Max: 1.0 sec.
Navy Model: Not assigned.
Performance: The starter shall be capable of
providing the following output torques when supplied
with the inlet conditions shown in Figure 3:
ATS OUTPUT TORQUE (LB-FT)
DRIVE SPEED
STD. DAY
HOT DAY
RPM
COLD DAY
(125F)
(-40F)
(59F)
84.1
81.9
71.6
7,500
20.0
15,000
23.9
" 22.0
Rated Conditions: (Minimum Allowable Performance for
3.5.1
59F Standard Day Inlet Air Supply)
NOTE : Unless otherwise specified, tolerances
applicable to pressure shall be 1 PSIA and
temperature 15F.
Main Enqine Start/Motoring Mode:
1.
Operating time - 2 minutes starting/10 minutes
motoring MINIMUM
Output Drive Speed - (30%) 7500 rpm
Output Drive Torque - 100.6 lb-ft MINIMUM
Inlet Air Total Pressure - 55 psia
Inlet Air Total Temperature - 400F
Inlet Air Flow - 142 lb/rein MAXIMUM
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