Caption:
In 1917 Charles F. Kettering invented the unmanned Kettering Aerial Torpedo, nicknamed the Bug. Launched from a 4-wheeled dolly that ran down a portable track, the Bug's system of internal pre-set pneumatic and electrical controls stabilized and guided it toward a target. After a predetermined length of time, a control closed an electrical circuit, which shut off the engine. The wings were released and its 180 pounds of explosive detonated on impact. The Bug never saw combat. After the war, the US Army Air Service conducted additional tests, but the scarcity of funds halted further development.