How do you activate and use the Tiller on a commercial liner such as a 737,757,767,etc?

Answer 1

on a 707, the Nose Wheel Steering is activated through the Down side of the landing gear handle. That is, when the landing gear lever in the cockpit is selected to down, it mechanically opens a valve, which allows hydraulic fluid to the steering cylinders. While the plane is airborne(gear down) the the nose wheel strut is completely extended and a centering cam holds the nose wheel straight. Normally below 100kts the steering tiller is used, as the rudder becomes more/less effective as you are taking off or landing. More modern aircraft use more advanced systems, but this is the basics.

Answer 2

When the aircraft is on the ground (weight on wheels) and the appropriate hydraulic system is pressurized the nose wheel steering is active either through the tiller or rudder pedals. It is only deactivated during aircraft towing by use of a steering bypass mechanism or when the aircraft is airborne (weight off wheels) through a mechanical or electronic disconnect system depending on type of aircraft. As far as use, the tiller is used to steer the aircraft when tighter turns are needed at slow taxi speeds. As the aircraft speeds up and smaller corrections are needed to keep it going straight, or during start of the take-off roll, steering is accomplished via the rudder pedals which are coupled to the nose wheel steering until the aircraft is off the ground.

Answer 3

scott.rm is right .

Answer 4

............... they are active after start ........... unless something is wrong ..................