Lecture 34/35 - Helicopters

What does collective control?

up and down

What does cyclic control?

directional

what do pedals control?

tail rotor

what does throttle control?

power

Helicopter diagram

Feathering is equivalent to ____

AoA

Key motions of helicopter blades

• lagging

• flapping

• feathering

What are the three rotor heads?

• rigid (hingeless)

• semi-rigid (teetering)

• fully articulated 

  • can do all 3 motions, most maneuverable

What is the primary means of countering dissymmetry of lift?

blade flapping

Critical mach number and V_{adv tip}

What is the primary means of countering dissymmetry of lift?

blade flapping