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Terms in this set (31)
ailerons, elevator (or stabilator),
What three systems does the primary controls of the aircraft consist of?
leading edge devices, spoilers, and trim systems
The secondary flight controls consist of what four systems
are attached to the outboard trailing edge of each wing and move in the opposite direction from each other.
This system control roll about the longitudinal axis is connected by cables, bellcranks, pulleys, and/or push-pull tubes to a control wheel or control stick.
By Moving the control wheel, to the right, what direction does it causes the right aileron to deflect ______ and the left aileron to deflect ______.
controls pitch about the lateral axis.
is essentially a one-piece horizontal stabilizer that pivots from a central hinge point.
movement of the aircraft about its vertical axis. This motion is called yaw.
utilizes two slanted tail surfaces to perform the same functions as the surfaces of a conventional elevator and rudder configuration.
are the most common high-lift devices used on aircraft.
plain, split, slotted, and Fowler flaps
There are four common types of flaps:
is the simplest of the four types flaps. It increases the airfoil camber, resulting in a significant increase in the coefficient of lift (CL) at a given AOA. At the same time, it greatly increases drag and moves the center of pressure (CP) aft on the airfoil, resulting in a nose-down pitching moment.
This type of flap is deflected from the lower surface of the airfoil and produces a slightly greater increase in lift than the plain flap. More drag is created because of the turbulent air pattern produced behind the airfoil.
The most popular flap on aircraft today is the
This type of flap increase the lift coefficient significantly more than plain or split flaps.
This type of flap is lowered, high energy air from the lower surface is ducted to the flap's upper surface.
This is a type of slotted flap. This flap design not only changes the camber of the wing, it also increases the wing area. Instead of rotating down on a hinge, it slides backwards on tracks. In the first portion of its extension, it increases the drag very little, but increases the lift a great deal as it increases both the area and camber.
fixed slots, movable slats, leading edge flaps, and cuffs.
High-lift devices also can be applied to the leading edge of the airfoil. The most common types are
direct airflow to the upper wing surface and delay airflow separation at higher angles of attack. The slot does not increase the wing camber, but allows a higher maximum CL because the stall is delayed until the wing reaches a greater AOA.
consist of leading edge segments that move on tracks. At low angles of attack, each slat is held flush against the wing's leading edge by the high pressure that forms at the wing's leading edge. As the AOA increases, the high- pressure area moves aft below the lower surface of the wing, allowing the slats to move forward.
Leading edge flaps
like trailing edge flaps, are used to increase both CL-MAX and the camber of the wings. This type of leading edge device is frequently used in conjunction with trailing edge flaps and can reduce the nose-down pitching movement produced by the latter.
Leading edge cuffs
extend the leading edge down and forward. This causes the airflow to attach better to the upper surface of the wing at higher angles of attack, thus lowering an aircraft's stall speed.
Found on some fixed-wing aircraft, high drag devices called ______. are deployed from the wings to spoil the smooth airflow, reducing lift and increasing drag.
used to relieve the pilot of the need to maintain constant pressure on the flight controls, and usually consist of flight deck controls and small hinged devices attached to the trailing edge of one or more of the primary flight control surfaces.
attached to the trailing edge of the elevator.
work in the same manner as balance tabs except, instead of moving in the opposite direction, they move in the same direction as the trailing edge of the stabilator.
a small portion of a flight control surface that deploys in such a way that it helps to move the entire flight control surface in the direction that the pilot wishes it to go.
is an automatic flight control system that keeps an aircraft in level flight or on a set course. It can be directed by the pilot, or it may be coupled to a radio navigation signal.
At what airspeeds does the controls usually feel soft
and sluggish, and the aircraft responds slowly to control applications
At what airspeeds does the controls become increasingly firm and aircraft response is more rapid.
this is the natural and undesirable tendency for an aircraft to yaw in the opposite direction of a roll.
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