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Fundamentals of rotor and power train maintenance techniques and
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Description
FUNDAMENTALS OF ROTOR AND POWER TRAIN MAINTENANCE-TECHNIQUES AND PROCEDURES FM 1-514


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Product Details
Print Length: 68 pages
Simultaneous Device Usage: Unlimited
Publisher: www.survivalebooks.com, www.armytechnicalmanuals.com, www.armymilitarymanuals.com (1991)
Sold by: Amazon Digital Services, Inc.
Language: English

Book Description
Basic flight theory and aerodynamics are considered
in full detail when an aircraft is designed. The rotor
repairer must understand these principles in order to
maintain aircraft safely and to make repairs that are
structurally sound and aerodynamically smooth.

AERODYNAMICS
Aerodynamics deals with the motion of air and with
the forces acting on objects moving through air or
remaining stationary in a current of air. The same
principles of aerodynamics apply to both rotary-wing
and fixed-wing aircraft. Four forces that affect an
aircraft at all times are weight, lift, thrust, and drag:

Weight is the force exerted on an aircraft by
gravity. The pull of gravity acts through the
aircraft’s center of gravity, which is the point
at which an aircraft would balance if
suspended. The magnitude of this force
changes only with a change in aircraft weight.

Lift is produced by air passing over the wing
of an airplane or over the rotor blades of a
helicopter. Lift is the force that overcomes
the weight of an aircraft so that it can rise in
the air.

Thrust is the force that moves an aircraft
through the air. In a conventional fixed-wing
aircraft, thrust provided by the propeller
moves the plane forward while the wings
supply the lift. In a helicopter both thrust and
lift are supplied by the main rotor blades.

Drag is the force of resistance by the air to the
passage of an aircraft through it. Thrust force
sets an aircraft in motion and keeps it in motion
against drag force.

Any device designed to produce lift or thrust when
passed through air is an airfoil. Airplane wings,
propeller blades, and helicopter main and tail rotor
blades are all airfoils

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