Page explaining 'Flapback and Flap Forward' from 'The Private Helicopter Pilot's Guide.' Principles of flight can be hard to grasp. It is much harder to learn new things when you have not been to school for a while. Our minds respond to visual information much more quickly, one graphic can be worth a ream of text. The principles of flight section alone has over a thousand specially created graphics (no photocopies or scanned images). All of them are produced in colour.

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