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MIL-S-22518 /3(AS)
REQUIREMENTS  (Continued)
Applicable paragraphs
of MIL-S-22518A(AS)
Rated Conditions:
3.5.1
Starter  (Pad "A"):
Drive Speed (RPM):  1020
Drive Torque, Min (Lb-Ft):  202
Airflow, Max (Lb per Min): 90
Inlet Air Total Pressure (In. Hg A):  100
345
Inlet Air Total Temperature
29.9
Exhaust Gas Discharge Pressure (In. Hg A):
Accessory Drive (Pad "B"):  The unit shall
have a continuous rating of 55 HP, overload
ratings of 65 HP for one hour, 82 HP for
two minutes and 110 HP for five seconds and
fault clearing of 140 HP. The 55 HP, 65 HP,
and 82 HP ratings shall apply through a speed
range of 3500-7200 RPM.  The 110 HP rating
shall apply through a speed range of 4000-7200
RPM.  The accessory drive output RPM shall
be the same as the starter output RPM.
3.5.1
cutout RPM:
3200 plus 200 minus 0
Maximum Temperature Limit:  The air turbine shall be
3.5.2
capable of operating with a maximum inlet air
3.5.8
total temperature limit of 650F at rated inlet
air total pressure.
Altitude:  The ATS/AD shall not be damaged when subjected
3.5.8
4.5.17
to 75,000 ft altitude in the overrunning mode
of operation.
Attitude:  The ATS/AD shall be capable of meeting the
3.5.9
operational requirements when the ATS/AD centerline,
taken through the pad "A" shaft axis, is in any
position within 10 degrees of the horizontal position.
Inverted flight test time is 15 minutes.
Overrunning (Qualification) :  The ATS/AD shall be overrun
3.5.10
at a 7250 RPM pad "A" drive speed for a total of
4.5.10
20 hours.  Testing need not be continuous, but
test periods shall not be less than 5 hours.

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