MIL-S-19557/4(AS)
11 September 1972
MILITARY SPECIFICATION SHEET
STARTER. AIRCRAFT ENGINE. AIR TURBINE. MODEL A-21
The complete requirements for procuring the air turbine starter
described herein shall consist of this document and the issue in effect
of Specification MIL-S-19557C (AS).
APPLICABLE
PARAGRAPH OF
SPECIFICATION
Envelope:
3.8.1
Figure 1
Wt. Max (Lb): 22
3.7
A-3
Aircraft Model:
6.3.1
Engine Model: J57
4.5.16
Quick-Attach-Detach Mounting: Yes
3.8.2.1
Engine Accessory Drive:
AND20002, Type XIIS
3.8.2.2
Figure 1
Air Inlet and Exhaust Connections:
3.8.3
Rotation Viewed from Anti-Drive End: Clockwise
3.5.5
3.9.1
3.3.2
Exposure Temperature Range (°F): -100 to +275
Ambient Temperature Operating Range (°F): -65 to +160
3.3.2
3.3.2.3
Control Valve:
22 psig per sec for the first
Opening Rate, Max:
4.5.1.1
4.5.6
.1 sec
Closing Time, Max: 0.5 sec
Navy Model: ATSCV-1
3.5.1
Rated Conditions:
Output Drive Speed (RPM): 1100
Output Drive Torque, Min (Lb-Ft): 185
Airflow, Max (Lb per Min): 90
Air Inlet Total Pressure (In. Hg A): 100
Air Inlet Total Temperature ( OF): 350
cut out Spe ed (RPM):
3150 ±250
3.5.1
3.5.7
Automatic Shutoff Control: Either turbine wheel speed
3.5.7
or output drive speed may be sensed for control
operation.
FSC-2995
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