Flight of a Glider
This Demonstration shows the flight path of a glider, depending on the initial velocity of the plane, its release angle, and the plane's drag coefficient . The flight is governed by Lanchester's system of autonomous nonlinear differential equations:[more]
where is the velocity of the plane at a given time and is the angle between the horizontal and the plane at time . The plot shows the distance traveled versus the height of the plane above the ground.[less]
 F. W. Lanchester, Aerial Flight: Aerodonetics, London: Constable, 1908.