 |
|||
|
|
|||
| ||||||||||
|
|  MIL-S-22518 /3(AS)
REQUIREMENTS (Continued)
Applicable paragraphs
of MIL-S-22518A(AS)
Phase C -
Test Stand
Phase B -
Phase A -
At Following Conditions
Acceleration
Rotor Polar
Moment of
Drive
Drive
Inertia
Speed*
Speed* Time
Max
Sec
Sec
RPM
Sec
RPM
Lb-Ft
12
430
1200
2350
202
8
10
1020
*Pad "A"
NOTE :
The above values do not allow for flywheel windage losses,
test stand drag, or inertia of the ATS/AD. In order to
determine compliance with this specification, the test
equipment shall be calibrated and specific test results
corrected accordingly. If the acceleration specified for
phase C is not developed because of test stand drag
torque, the test stand inertia load may be reduced or
external power may be applied to assist acceleration to
cutout speed. Time for end of phase C to cutout shall not
exceed 34.5 seconds.
4.5.9
Rated Torque Calibration:
Pad "A" Drive Speed (RPM), Min:
1020
Airflow, Max (Lb per Min): 90
4.5.10
Overrunning: The ATS/AD shall be overrun at a pad "A"
drive speed of 7250 RPM for a total of 20 hours.
Testing need not be continuous, but test periods
shall not be less than 5 hours.
Low Temperature Operation:
Starter: The inlet air and the stabilized ATS/AD
temperatures for the low temperature test shall
be as follows:
Inlet Air Total
Inlet Air Total
ATS/AD Temperature
Temperature
Pressure
140
260
-65
After the ATS/AD temperature has been stabilized
for a minimum of 8 hours at
three consecutive
cycles at -65F ambient air temperature shall be run.
Each cycle shall consist of the following phases:
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals