Avoid clearances that require greater than normal taxiing power for which aircraft?

Avoid clearances that require greater than normal taxiing power for which aircraft?

• A. Light propeller aircraft
• B. Turboprops
• C. Helicopters
• D. Super or heavy jet aircraft

Answer: (D)

The key idea is how much thrust is needed to move on the ground. Normal taxiing power is kept at a modest, controlled setting to manage speed, limit jet blast, and keep everyone and equipment safe. A clearance that would require greater than normal taxiing power asks an aircraft to push the thrust higher than usual while taxiing. The largest, most powerful airplanes—the heavy or large jets—need substantially more thrust to start moving and to maneuver on the ground because of their weight and inertia. That extra thrust increases jet blast and ground turbulence, raising safety risks for people, vehicles, and nearby equipment. Lighter propeller aircraft and turboprops have much smaller thrust needs and can ordinarily comply with taxiing at normal power. Helicopters don’t taxi in the same way, since they move with rotor thrust rather than engine power for ground taxi. For these safety and control reasons, avoid clearances that demand more than normal taxi power from the heavy jet group.

The key idea is how much thrust is needed to move on the ground. Normal taxiing power is kept at a modest, controlled setting to manage speed, limit jet blast, and keep everyone and equipment safe. A clearance that would require greater than normal taxiing power asks an aircraft to push the thrust higher than usual while taxiing. The largest, most powerful airplanes—the heavy or large jets—need substantially more thrust to start moving and to maneuver on the ground because of their weight and inertia. That extra thrust increases jet blast and ground turbulence, raising safety risks for people, vehicles, and nearby equipment. Lighter propeller aircraft and turboprops have much smaller thrust needs and can ordinarily comply with taxiing at normal power. Helicopters don’t taxi in the same way, since they move with rotor thrust rather than engine power for ground taxi. For these safety and control reasons, avoid clearances that demand more than normal taxi power from the heavy jet group.