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Page Title:
Attack, Patrol and Trainer Helicopters |
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| MIL-D-23222A(AS)
3.11.3.1
(Cont)
(a) Climb to within 2000 feet of the design
service ceiling (intermediate power) and remain
at this altitude not less than five minutes.
(b) Descend to any altitude under 1000 feet and
remain at this altitude not less than five
minutes.
(c) Climb to within 2000 feet design service
ceiling (intermediate power) and remain at this
altitude for not less than 10 minutes and
then commence firing.
(2) Speed: The first load shall be fired at a minimum
stabilized level airspeed. The second load shall
be fired Guning indicated airspeed within 0.8 Vmax
to Vmax.
(3) Load Factor: The first load shall be fired at a
normal load factor of me. The second load
shall be fired at a normal load factor of 0.9nz
or 0.9 maximum safe load factor at the specified
altitude.
(4)
Gun gas concentration: At no time during the
firing demonstration shall the gun gas concentra-
tion anywhere in the helicopter except in the
blast tubes and the immediate ViCinity of the
breech and vent plug, exceed 90 percent of the
lower explosive limit as indicated on equipment
approved by NAVAIR.
(5) Equipment operation: All applicable sighting
equipment and radar Control equipment shall be
operating satisfactorily throughout the firing
demonstration.
Engine operation: At no time during the firing
(6)
demonstration shall the tail pipe temperature
rise over the allowable transient over-tempera-
ture conditions specified by the engine manufacturer
and indicated on appropriate aircraft instruments;
and there shall be no evidence of compressor stall
or engine flame-out, nor shall there be evidence
of aircraft stability degradation demonstrated in
accordance with 3.8.2.
73
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