SACAA CPL(H) Principles Of Flight Practice Questions - SACAA Commercial Pilot Licence (Helicopter) Principles Of Flight Examination Exam

Symmetrical aerofoils maintain a constant centre of pressure (CP) as angle of attack changes, preventing unwanted pitching moments. Symmetrical aerofoils generate higher maximum lift coefficients (CL max) than cambered aerofoils at low speeds. Symmetrical aerofoils eliminate induced drag entirely during high-speed forward flight. Symmetrical aerofoils require zero engine power to maintain rotational velocity in hover.