EASA ATPL · 081 & 032
Every diagram is alive, and driven by real equations.
Interactive teaching material for Principles of Flight and Aeroplane Performance. Drag the angle of attack and watch the lift coefficient climb the curve, the section rotate against the airflow, and the wing stall — computed from the governing equations, not animated to look convincing.
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Teaching a class
Every lesson becomes a slide deck of its charts: full screen, one figure per screen, enlarged controls, and keyboard or clicker navigation. The prose, the headings and the working stay behind — the diagram does the talking.
Studying for the exam
Follow the EASA tree, see where each lesson sits and which areas it covers, and replay every interaction at your own pace. No quizzes — this app teaches, it does not test.
Just curious
Skip the numbering. Come in through a question — why wings stall, what induced drag is, why an aeroplane floats before touchdown — and read the same material.
Lessons available now
Subsonic aerodynamics is being written first. The rest of the syllabus tree is visible from day one so you can see where everything is going. Pick one: signing up and subscribing takes you straight back to it.
- 01The atmosphere and airspeedsDensity is the hidden variable behind everything an aeroplane does. The standard atmosphere, dynamic pressure, and why there are four different airspeeds.
- 02Lift and the lift equationWhere lift comes from, and the one equation that governs it. Four things you can change, one number you must hit.
- 03The lift curve and the stallHow C_L varies with angle of attack, why the relationship is a straight line until it suddenly is not, and what the critical angle really means.
- 04Drag, the polar, and the best speed to flyParasite drag rises with speed, induced drag falls with it, and where they cross is the most efficient speed the aeroplane has.
- 05Stall speed: weight, load factor and bankWhy stall speed moves when the angle it happens at does not — and where the 41 % at 60° of bank comes from.