MIL-STD-1227B
4.2 Use conditions. The installation shall withstand shock loads as
specified in the end-item specification. The installation shall be such
that the engine will not be required to operate in a tilted position of
more than 15 degrees from the horizontal in any plane at any time.
4.3 Design simplicity. The design of the end item shall be such that
complete removal of the engine from the driven component or the driven
component from the engine can be accomplished with minimum disassembly and
without the use of special tools.
5. DETAIL REQUIREMENTS
5.1 Power requirements. The maximum horsepower required to drive the
end item, including power transmission system, under the environmental
extremes specified for the end item, shall not exceed the net continuous
horsepower rating of the engine unless intermittent operation is indicated
in the end-item specification at which time the intermittent power require-
ments shall not be exceeded.
5.2 Operational temperature limits. The end item design and location of
hoods and other external components shall not cause the engine to exceed
the operational temperature limits specified in table I under all operating
conditions of load and environmental extremes specified in the end-item
specifications.
Operational Temperature Limits
Table I.
Maximum
temperature,
°F.
Location
120
Ambient air
In the vicinity of the engine.
Cylinder head
Under spark plug.
475
250
In the oil sump.
Lubricating oil
225
At cooling air outlet.
Cooling air
150
Air cleaner inlet.
Carburetor inlet air
3
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