It details why descending into your own wake (Vortex Ring State) is one of the most dangerous conditions in helicopter flight. 2. Blade Element Theory (BET)
If you are looking for a deep dive into the physics of vertical flight, 1. Momentum Theory and Actuator Disk Model It details why descending into your own wake
The book explains how to calculate the power required to hover and introduces the Figure of Merit , a standard efficiency metric for rotors. a standard efficiency metric for rotors.
