Dynamic thrust is the net force available to an aircraft, determined by subtracting aerodynamic drag from total propulsion thrust in a specific flight condition. In level flight (T=D), dynamic thrust is zero, while in climb or acceleration (T>D), it’s positive, signifying excess thrust for climbing. Conversely, during descent or deceleration (T<D), it’s negative, indicating the aircraft is experiencing greater drag than available thrust. Formula for Dynamic Thrust (DT):
Where:
- is the dynamic thrust in N,
- is the total thrust produced by the propulsion system in N and,
- is the drag force acting on the aircraft in N.