Lift-to-Drag ratio, measures how efficiently a jet aircraft generates lift relative to drag. A higher L/D ratio indicates better aerodynamic efficiency. This parameter is crucial for optimizing fuel efficiency and enhancing the aircraft’s range. Aircraft with sleek designs and minimized drag aim for higher L/D ratios. A higher L/D ratio enhances jet aircraft endurance by allowing them to cover more distance with the available fuel. Additionally, it lowers Specific Fuel Consumption, making the aircraft more fuel-efficient by reducing drag and optimizing lift. The formula to calculate (L/D)max as follows:
Where:
- (L/D)max is the maximum lift-to-drag ratio.
- is the range of the aircraft in m.
- is the specific fuel consumption in kg/Ws.
- is the velocity of the aircraft at (L/D)max in m/s.
- is the initial weight of the aircraft in kg.
- is the final weight of the aircraft in kg.