Identify Aspects Of Helicopter Aerodynamics

Identify Aspects Of Helicopter Aerodynamics

EOC331.03

The Importance

It’s important for cadets to identify aspects of helicopter aerodynamics so that they can appreciate the differences between airplanes and helicopters.

The Rotor Systems

• The Rotor Blades

• The Rotor Head

• The Drive Shaft

Rotor Drag

- opposite of rotor thrust

- slows down

- should not be confused with aerodynamic drag

Factors Influencing Rotor Thrust

• Air Density

• Rotor Revolution per Minute (RPM)

• Blade (Pitch) Angle

• Disc Area

Multiple Select

What are the 3 basic parts of a rotor system (choose all 3)

• Rotor Head

• Rotor Shaft

• Drive Shaft

• Rotor Blades

Multiple Choice

Which force acts opposite to rotor thrust

• Drive Thrust

• Drive Drag

• Rotor Drag

• Rotor Lift

Open Ended

How does Disc Area influence rotor thrust

Anti-Torque Rotor

- Location

-Function

-Power Source

Multiple Choice

The Anti-Torque rotor is normally at the _______ of the helicopter

• The back

• The Front

• The Side

Open Ended

What is the purpose/ function of the Anti-Torque rotor?

Open Ended

What is the power source of the anti-torque rotor?

Control Inputs of a Helicopter

• Collective

• Cyclic

• Pedals

Collective

• Left side of the pilot seat

• Controls the angle of attack

• The end is like a throttle

Cyclic

- The column is known as the cyclic

- Moving it left will angle the rotor blades left

Pedals

• Similar to rudder Pedals

• Control the nose

Open Ended

What does the collective control?

Open Ended

What does the cyclic control

Open Ended

What do the pedals control?