MIL-DTL-60283C
Primary components. For the purpose of this specification, the M91 cartridge (Drawing
3.2
8597230) is defined as a primary component. Only primary components from a single lot shall be used in
the production lot of initiators. One primary component production lot may be used in more than one
initiator production lot.
Breakaway torque. The chamber and cap of each assembled initiator shall withstand a
3.3
breakaway torque application of 400 inch pounds without loosening or deformation (see 4.3.1).
Residual magnetism. The initiator shall not deflect the indicator of the compass more than 5
3.4
degrees in either direction using procedures in 4.3.2.
Firing pin release. The firing pin of the assembled initiator, less safety pin and cartridge, shall
3.5
release from the cocked position when the application of an axial load of 15 to 30 pounds has withdrawn
the initiator pin 0.370 inch, minimum, and 0.425 inch, maximum (see 4.3.3).
Initiator pin security. Application of an axial load of 200 to 220 pounds to the initiator pin of
3.6
the assembled initiator shall not withdraw the initiator pin past the safety pin. Load application shall
cause no permanent deformation of the safety pin (see 4.3.4).
Functional. (See 4.3.5)
3.7
3.7.1 Ballistics. Initiators loaded with cartridges from one accepted lot and temperature conditioned
shall perform within the pressure values and ignition delay time (see 6.6.2) specified in table I. Pressure
values shall be recorded at the end of 15 feet of aircraft hose, MS28741-4, and a pressure chamber with a
volume of 1 cubic inch.
TABLE I. Pressure values.
Temperature (°F)
Pressure (psi)
Ignition delay time
Max (ms)
-60 to -75
700 to 1425
65
65 to 75
800 to 1550
65
195 to 205
900 to 1700
65
Misfires. There shall be no misfires.
3.7.2
Mechanical failures. The initiator shall function without mechanical failure (see 6.6.1).
3.7.3
Workmanship. Initiators shall be free of cracks, splits, incomplete or damaged threads on inlet
3.8
and outlet ends, or other defects which might prevent proper mating with connecting parts or proper
functioning of the device.
3.8.1 Metal defects. All components shall be free from cracks, splits, cold shuts, inclusions, porosity,
or any similar defects.
3.8.2 Burr. No part shall have a burr which might interfere with the assembly or function of the item
or which might be injurious to personnel handling the item.
3.8.3 Foreign matter. No part or assembly shall contain chips, dirt, grease, rust, corrosion, or other
foreign matter.
Radiographic examination. Each initiator assembly shall be radiographically examined for
3.9
defects as specified in 4.4.
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