TM 55-1520-240-23-10
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SKIS
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Skis are installed on forward and aft landing gears to
prevent the helicopter from bogging down in snow after
landing. They are made of fiberglass and the bottoms
are finish coated with epoxy coating 462, graphite filled,
cured and treated with silicone and paraffin wax to
prevent freezing or sticking to snow.
NO BREAK - WORK HARDER
Skis are designed for temporary installation. Installation
and removal of skis requires removal of very few
permanent parts.
NO BREAK - WORK HARDER
The forward skis are 46 inches wide and 136.75 inches
long. The aft skis are 33 inches wide and 114.5 inches
long.
NO BREAK - WORK HARDER
Installation and operation of all four skis is similar. The
helicopter can be towed in place over the skis, or it can
be jacked and the skis placed under the landing gear.
In both procedures, the tires are placed into cutouts in
the skis. Each ski is supported on the landing gear by
a spring-mounted swivel tall wheel, a spring cylinder,
and axles. Ski axles on both sides screw into the
landing gear axle stubs. Horizontal balance of the ski is
maintained by a safety cable and shock ring assembly, a
check cable, and the spring cylinder.
END OF TASK
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