The Grahame-White Ganymede was a prototype British heavy night bomber intended to serve with the Royal Air Force in the First World War.
A large, three-engined, twin-boom biplane, the sole prototype Ganymede did not fly until after the war had ended, and although an attempt was made to convert the aircraft to an airliner, it was unsuccessful.
In 1918, the Grahame-White Aviation Company of Hendon, London developed a large, long-range heavy bomber intended to equip the Royal Air Force.
The resulting design, the E.IV Ganymede, was of unusual layout, being a three-engined, twin-boom biplane with four-bay wings.
While it was tested by the Air Ministry during 1919, the RAF had little interest in purchasing a new heavy bomber, and the remaining two prototypes were cancelled.