Which orientation describes a hazard with spinning blades on a rotor?

Which orientation describes a hazard with spinning blades on a rotor?

• A. Propeller plane of rotation
• B. Turbine plane of rotation
• C. Ground Handling
• D. Taxiing

Answer: (A)

Spinning blades create a defined disk area—the plane of rotation. This is the space the blades sweep as they spin, so the main safety concern is staying out of that disk to avoid contact with a blade tip. Describing the hazard as the propeller plane of rotation identifies the exact orientation of the rotating blades and the area you must keep clear. Ground handling and taxiing refer to actions around the aircraft and don’t describe the orientation of the blades themselves. A turbine plane of rotation would apply to a turbine engine’s rotor, not the rotor with blades that behave like a propeller in this context.

Spinning blades create a defined disk area—the plane of rotation. This is the space the blades sweep as they spin, so the main safety concern is staying out of that disk to avoid contact with a blade tip.

Describing the hazard as the propeller plane of rotation identifies the exact orientation of the rotating blades and the area you must keep clear. Ground handling and taxiing refer to actions around the aircraft and don’t describe the orientation of the blades themselves. A turbine plane of rotation would apply to a turbine engine’s rotor, not the rotor with blades that behave like a propeller in this context.