The lift-to-drag ratio (L/D) of a propeller-driven aircraft represents the efficiency of generating lift relative to the drag encountered during flight. It is influenced by factors such as wing design, fuselage shape, and propulsion system efficiency. Calculated from detailed aerodynamic data, a higher L/D ratio indicates a more aerodynamically efficient aircraft. This ratio is crucial for assessing fuel efficiency and overall performance in flight. The formula to calculate L/D ratio as follows:
Where:
- C is the Specific Fuel Consumption in kg/Ws.
- R is the Range of Aircraft in m.
- η is the Propeller Efficiency.
- W0 is the Gross weight in kg.
- W1 is the Weight without Fuel in kg.