General: Steering system allows to steer the aircraft on ground. Smaller aircraft has mechanical linkages to effect steering of the nose gear. Larger aircraft generally ahs two steering hydraulic cylinders attached to the shock strut housing. Actuation of the cylinders ensure rotation of the upper torque link of the nose landing gear. Sliding tube gets rotation through the lower torque link and hence the nose gear turns. System has a follow up linkage so that when desired amount of turn.
Light Aircraft: Light aircraft are commonly provided nosewheel steering capabilities through a simple system of mechanical linkage hooked to the rudder pedals. Most common applications utilize push-pull rods to connect the pedals to horns located on the pivotal portion of the nosewheel strut.
Heavy Aircraft: Large aircraft, with their larger mass and a need for positive control, utilize a power source for nose. wheel steering. Even though large aircraft nose. wheel steering system units differ in their construction features, basically all of these systems work in approximately the same manner and require the same sort of units. For example, each steering system (figure 6.1) usually contains:
(1) A cockpit control, such as a wheel, handle, lever, or switch to allow starting, stopping, and to control the action of the system.
(2) Mechanical, electrical, or hydraulic connections for transmitting cockpit control movements to a steering control unit.
(3) A control unit, which is usually a metering or control valve.
(4) A source of power, which is, in most in stances, the aircraft hydraulic system.
(S) Tubing for carrying fluid to and from various parts of the system.
(6) One or more steering cylinders, together with the required linkages, for using pressurized fluid to turn the nose gear.
(7) A pressurizing assembly to keep fluid in each steering cylinder always under pressure, thereby preventing shimmy.
No comments:
Post a Comment