Helicopter Rotor Systems Quiz

What is the upward or downward movement of the rotor blades during rotation called?

• Blade Flap

• Blade Feather

• Blade Lead

• Blade Lag

What is the condition known as when helicopters with semirigid rotors experience excessive rotor flapping?

• Mast Bumping

• Blade Flap

• Blade Feathering

What is the main disadvantage of coaxial rotors?

• Increased mechanical complexity

• Higher vibration

• Higher aerodynamic drag

WHAT IS THE ADVANTAGE OF A RIGID ROTOR SYSTEM?

• GOOD CONTROL RESPONSE

• SIMPLE DESIGN, CRISP RESPONSE

• SIMPLE AND EASY TO HANGAR DUE TO BLADE CONFIGURATION

• NONE OF THE ABOVE

Which type of rotor system allows blades to flap together as a unit?

• Rigid Rotor System

• Tandem Rotor System

• Fully Articulated Rotor System

• Semirigid Rotor System

What is the main disadvantage of a fully articulated rotor system?

• Complex design

• Limited control response

• High aerodynamic drag

• Increased vibration

What does the term 'feathering' refer to in rotor systems?

• The upward movement of blades

• The rotation of blades around their pitch axis

• The fore and aft movement of blades

• The downward movement of blades

What is the purpose of the swash plate in a helicopter?

• To control the tail rotor

• To stabilize the helicopter

• To convert stationary control inputs into rotating inputs

• To provide lift

What is the main function of the freewheeling unit in a helicopter?

• To disengage the engine from the main rotor during failure

• To increase lift

• To stabilize the helicopter

• To control rotor speed

What is the role of dampers in a fully articulated rotor system?

• To control the pitch angle

• To stabilize the helicopter

• To absorb acceleration and deceleration of rotor blades

• To increase lift