Flight Mechanics
Course Outcome
This course is designed to equip studuents with the principles of aircraft motion, forces, and moments; analyze stability and control; understand performance in various flight regimes; apply equations of motion; interpret aerodynamic effects; and solve practical flight mechanics problems relevant to aircraft and UAV design and operation.
Pedagogical Approaches
Animated content, 3D Simulations, and Video lecture integrations
Prerequisite Subjects
Engineering Mathematics, Engineering Mechanics.
Explore the topics
Module 1: International Standard atmosphere
Module 2: Classification of aircraft
Module 3: Airplane configuration
Module 4: Primary flight instruments
Module 5: Aerodynamic forces and moments
Module 6: Drag polar
Module 7: Airplane performance
Module 8: Longitudinal Static stability
Module 9: Lateral & Directional Static stability
Module 10: Dynamic stability
Virtual Lab
Good internet connectivity
Scientific Calculator: For manual verification of kinematic equations.
| Phase | Formula | Key Variable |
|---|---|---|
| Ground Roll (Sg) | \( S_g = \frac{V_{TO}^{2}}{2a} \) \( a = \frac{g}{W}[T - D - \mu(W-L)] \) | Acceleration \(a\) |
| Rotation (Srot) | \( S_{rot} = V_{TO} \cdot t_{rot} \) | Rotation time \(t_{rot}\) |
| Transition (Str) | \( S_{tr} = R \cdot \sin(\gamma) \) \( R = \frac{V_{TO}^{2}}{g(n-1)} \) | Load factor \(n\) |
| Climb Angle (γ) | \( \sin(\gamma) = \frac{T-D}{W} \) | Excess Thrust \(T-D\) |
Acceleration Phase: The aircraft must overcome static and rolling friction. As speed increases, Lift (L) reduces the effective weight on the wheels, reducing friction but increasing aerodynamic drag (D).
Rotation: The point where the nose gear leaves the ground. A longer rotation time increases the horizontal distance significantly without gaining altitude.Transition Geometry: The aircraft follows a circular arc. The radius (R) of this arc depends on the "pull-up" load factor (n). A higher n results in a tighter turn but requires more structural strength and pilot skill.
1.
