This Book represent the design of an UAV with midrange, low altitude and low payload.In this volume the selection of engine, weight estimation C.G location, Aerofoil selection, Drag, Lift estimation, Take off & Landing distance and landing gear congratulations of an UAV are included and the next volume will be include the performance, Calculation Of Stalling Velocities,Climbing & Gliding flight, ceiling, Level Turn, Pull Up & Pull Down maneuver,V-n Diagram, Stability and Control Surface design calculations.