Figure 1-2.
Principal Airframe Parts (Helicopter).
problem is to make the relatively thin shells strong enough to
withstand compression and shear loads and to maintain a favorable
weight-to-strength relation.
In general, the discussion here
explains how this is achieved for airplanes and helicopters.
This section describes the four principal parts of an airplane and
the cabin and tailboom sections of a helicopter.
The descriptions
include details
involving
truss,
monocoque,
and
semimonocoque
constructions.
PRINCIPAL AIRFRAME PARTS (AIRPLANES)
An airplane's four principal parts are the fuselage, nacelle,
wings and empennage. The descriptions in the following
paragraphs cover the truss, monocoque, semimonocoque, and
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