3.2 Components and assemblies. The components and assemblies
shall comply with all requirements specified on Drawing 9334097
and associated drawings and with all requirements specified in
applicable specifications and standards:
3.3 M73 general purpose HE grenade. The grenade shall comply
with specification MIL-G-63444.
The fuze shall comply with specification
3.4 M439 fuze.
The metal parts shall comply
3.5 M261 Warhead metal parts.
with specification MIL-W-64044.
3.6 Expulsion charge. The expulsion charge shall be capable,
when initiated by the M439 Fuze, of ejecting the cargo from the
warhead in less than 100 msec under all delivery conditions.
3.7 Reliability. The reliability of the
M261 Warhead will be
based on reliability of payload ejection from
the Warhead case.
The minimum acceptable value (MAV) of payload
ejection shall be
93% and the best operational capability (BOC)
shall be 97% at 90%
3.8 Interfaces. The warhead should be compatible with the
MK66 Mod 1 motor and have a fuze charging umbilical lead capable
of interfacing with the fuze charge receptacles of the M260, M261,
M227 and M158A1E1 Launchers. The main event fuze in the warhead
shall be compatible with the electrical characteristics of the
Rocket Management Subsystems on Army helicopters.
3.9 Fluoroscopic or radiographic inspection. The M261
Warhead shall be fluoroscopically or radiographically examined to
verify to the extent possible the presence and positioning of all
components as well as the absence of foreign material. Warheads
selected for first article testing shall be radiographically
examined with Government approved equipment prior to static or
field firing. Radiographs shall be of a quality which will permit
proper evaluation as determined by the responsible technical
agency of the Government.
The weight shall be 13.50 ± 0.25 pounds.
3.10 Warhead weight.
3.11 Rough handling. The warhead shall withstand rough
handling when tested as specified in 4.5.2, and with the exception
of the five foot drop test, shall comply with the ballistic test
as specified in 4.5.8. The warhead shall be safe to handle and
dispose of following the five foot drop test.