EASA 081

Principles of Flight

EASA PPL subject 081 — aerodynamics & control

Principles of Flight (081) covers the four forces acting on an aircraft: lift, weight, thrust and drag. You learn how the aerofoil generates lift, when a stall occurs and how the control surfaces work together.

Topics covered

  • Four forces: lift, weight, thrust, drag
  • Aerofoil (NACA) and angle of attack
  • Stall: critical angle of attack, stall speed, stall recovery
  • Lateral, longitudinal and directional stability
  • Control surfaces: elevator, aileron, rudder, trim
  • Flap effect: impact on lift and drag
  • Spiral dive and other dangerous flight situations

Study tips for Principles of Flight

1

Draw the force diagram for climb, descent and level flight.

2

Stall is the most tested topic: know all factors that affect stall speed.

3

Connect principles of flight to the cockpit: when do you use trim, and why?

4

Use flight simulator videos to visualise different flight attitudes.

Specialists for Principles of Flight

These coaches and tutors specialise in this subject.

A.D.
Subject Expert Technical Subjects

Flight Instructor FI(A) with an MSc in Aerospace. Active instructor and the go-to person for everything related to aircraft systems, aerodynamics and weather.

  • Aircraft General Knowledge (021)
  • Principles of Flight (081)
  • Meteorology (050)

Need broader support?

These coaches support your broader PPL journey and study planning.

Ready to tackle Principles of Flight?

Book a free intro call with one of our specialists for subject 081.