The book explains how to calculate the power required to hover and introduces the Figure of Merit , a standard efficiency metric for rotors.
Leishman begins with the fundamentals: how a helicopter generates lift. Using , the rotor is modeled as an "actuator disk" that creates a pressure jump to accelerate air downward (induced flow). The book explains how to calculate the power
Leishman’s text is famous for showing how to combine Momentum Theory and BET into , providing a more accurate tool for rotor design. 3. Rotor Wake Dynamics The book explains how to calculate the power