The German Defense Against the Airship—Krupp Gun on Motor

This is one of the deadly Krupp aeroplane guns, mounted on a Mercedes auto truck. The rear wheels are braced to steady the gun from vibration under the heavy shock of firing.

An aeroplane is a very difficult target, not only on account of its rapid flight, but also because the only vital spots are the engine and the passengers.

THE GERMAN DEFENSE AGAINST THE AIRSHIP—KRUPP GUN ON MOTOR