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A yoke, alternatively known as a control wheel or a control column, is a device used for piloting some fixed-wing aircraft.Crane, Dale: Dictionary of Aeronautical Terms, third edition, page 563. Aviation Supplies & Academics, 1997. .
The aviator uses the yoke to control the attitude of the plane, usually in both pitch and Flight dynamics. Rotating the control wheel controls the ailerons and the roll axis. Fore and aft movement of the control column controls the elevator and the pitch axis. When the yoke is pulled back, the nose of the aircraft rises. When the yoke is pushed forward, the nose is lowered. When the yoke is turned left, the plane rolls to the left, and when it is turned to the right, the plane rolls to the right.
Small to medium-size aircraft, usually limited to propeller-driven, feature a mechanical system whereby the yoke is connected directly to the control surfaces with cables and rods. Human muscle power alone is not enough for larger and more powerful aircraft, so hydraulic systems are used, in which yoke movements control hydraulic valves and actuators. In more modern aircraft, inputs may first be sent to a fly-by-wire system, which then sends a corresponding signal to actuators attached to the aileron booster systems and control surfaces. Yokes may feature a stick shaker, which is designed to help indicate the onset of stall, or even a stick pusher, which physically pushes the yoke to prevent a stall.
In larger aircraft they are usually on a post protruding vertically from the floor, referred to as a control column. In most other planes, they are pivot point mounted on a horizontal tube that comes out of the instrument panel.
In the case of the Cirrus SR20 and Cirrus SR22, although the control looks like a side stick, it works like a yoke handle (referred to in the industry as a "side yoke"). The Cessna 162 uses a similar device.
Most yokes are connected and will both move together, thus providing instant indication to the other pilot when one makes a control input. This is in contrast to some fly-by-wire control sticks that allow each pilot to send different, and sometimes greatly conflicting, inputs. Competing inputs are signaled on Airbus craft.
Yokes take up more room than side-sticks in the cockpit and may even obscure some instruments; by comparison, side-sticks have minimal cockpit intrusion, allowing the inclusion of retractable tray-tables and making it easier to enter/leave small cockpits. "Learning To Fly In A Cirrus SR22" . planeandpilotmag.com. "Gear Up: One Big Airplane Training in US Airways' newest A330 simulator" . flyingmag.com.
A yoke, unlike a side-stick, may be used comfortably with either hand. This can be useful if one needs to write or manipulate other controls in the cockpit. This advantage is shared with the center-stick.
There are also computer designed to simulate a yoke, intended for .
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