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|  MIL-S-19557/10A(AS)
REQUIREMENTS (cent'd)
Applicable paragraphs
of MIL-S-19557C(AS)
(a) Self-Induced Vibration: Vary starter output
speed from 4290 (17%) .to 15,890 (63%) rpm. Record
maximum vibration and the speed at which it occurs.
(b) Speed Sensor Voltage: Record the peak to
peak voltage output from the speed sensor at starter
output speeds of 4290 (17%) and 15,890 (63%) rpm.
The voltage shall be within limits established by
para. 3.5.7.
The speed signal iS acceptable when all 24 pulses per
revolution are present at the monopole output
voltages and speeds shown below. Presence of all 24
pulses shall be determined with an oscilloscope, use
of a worst case FSR as shown on Figure 5 (see Figure
6 for calibration procedure), or equivalent means.
DRIVE SPEED
MONOPOLE OUTPUT VOLTAGE
PEAK TO PEAK
RPM
MIN
MAX
2,860
3.5V
30.0
10,590
3.5
30.0
(c) Motoring Dwell: Set starter output speed of
7570 (30%) 200 rpm, run for a minimum of 5 minutes
and record all performance data. The limits shall be
within limits established by para. 3.5.1(1).
(d) Ground Check-out Dwell: Set starter output
speed of 15,000 (59%) 200 rpm, run for a minimum of
15 minutes and record all performance data. The
limits shall be within limits established by para.
3.5.1(2).
(2) Operate at Main Engine Start conditions per para.
3.5.1 and perform the following runs:
(a) Calibration: Run at stabilized starter
output shaft speeds of O +200 rpm (stall condition)
and 7500 (30%) rpm. Record all performance
parameters. The torque/speed output shall be within
the limits of para. 4.5.4(1).
(b) Run five main engine start cycles as per
para. 4.5.6 except for elimination of phase B
stabilized condition. Allow a minimum of 2 minutes
between start cycles. Record time to starter cut out.
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