The Vickers Fighting Biplane 5 was the first aircraft specifically designed as a fighter for the Royal Flying Corps. With its engine mounted behind the cockpit, it the first pusher to enter service during World War I. Commonly referred to as the "Gunbus," it was armed with a moveable, forward firing machine gun. Vulnerable to attack from the rear, the Gunbus was soon replaced by more advanced single-seat fighter aircraft. Aces Units 1 Lionel Rees 6 Royal Flying Corps: 11, 18 Specifications Country: Great Britain Manufacturer: Vickers Type: Fighter Entered Service: July 1915 Number Built: More than 250 Engine(s): Gnome Monosoupape, 100 hp Wing Span: [11.1 m] Length: [8.3 m] Height: [3.4 m] Empty Weight: [553 kg] Gross Weight: [930 kg] Max Speed: [113 km/h] Ceiling: [2,740 m] Endurance: Crew: 2 Armament: 1 or 2 Lewis machine guns, 7.7 mm Aircraft Guests Search Copyright ? 1997-2002 Page revised on 09 January 2005