This book deals the design of an UAV with midrange, low altitude and less payload. This volume speaks about the Performance Calculations like Stalling Velocities, Climb Rate & Angle, Rate of Descent, Ceiling, Pull Up & Pull Down maneuver, Load Factors, Turn Level, Gliding Flight, V-n diagram, Stability and Control. The previous volume of this book fully deals about the Engine selection, Aerofoil selection, Weight estimation, Take Off & Landing distance, Landing Gear configuration, Drag & Lift estimation and C.G location. This book contains the calculations to design an UAV