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| MIL-D-23222A(AS)
COMBINATION OF POWER PLANTS. - On helicopters
3.10.3.3
where combinations of any of the above listed
engines are installed, all engines shall satisfy the foregoing
requirements that are applicable. In instances where the foregoing
Requirements specify different altitudes of operation for a parti-
cular combination of engines, it will be acceptable to accumulate
the required time on the booster engine(s) at the altitude required
for the main engine(s) for purposes or combining test programs.
Individual test program and data for each applicable engine as
listed in the foregoing paragraphs shall apply.
3.10.4
TRANSMISSION OPERATION TESTS. - The contractor
shall submit a proposed test program for the
demonstration of the power transmission system. This test program
shall be subject to the approval of NAVAIR. The purpose of this
test is to demonstrate that the power transmission system is safe and
adequate for the completion of all demonstration requirement tests
and Navy evaluation tests.
3.10.4.1
CONTROL LEVERS. - Control/condition/power levers
shall be free from automatic slippage under
vibration. Sensitivity of controls shall be such that easy and
accurate adjustments can be made over the entire speed or power range.
GROUND TEsTs. - Data listed in the applicable
3.10.5
Sub-paragraphs of 3.10.3 shall be recorded for
these tests. The thrust available at idle RPM shall not cause
objectionable taxi speeds.
STARTING CHARACTERISTICS. - The following starts
3.10.5.1
shall be performed:
Automatic. - Three starts in accordance with
(1)
the engine manufacturer's specified starting
procedure. On multi-engine helicopters, a
total of three starts per engine shall be made
on one side only.
Emergency. - If a manual (emergency) control
(2)
system is provided on the engines two starts
on this control in accordance with the engine
manufacturer's specified proocedure. On multi-
engine helicopters, a total of two starts on
each engine shall be made on one side only.
67
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