F4

Look up F4 in Wiktionary, the free dictionary.

F4, F.IV, F04, F 4, F.4 or F-4 may refer to:

Aircraft

Flanders F.4, a 1910s British experimental military two-seat monoplane aircraft
Martinsyde F.4 Buzzard, a British World War I fighter version of the Martinsyde Buzzard biplane
Fokker F.IV, a 1921 Dutch airliner
Caproni Vizzola F.4, an Italian prototype fighter of 1939
Lockheed F-4 Lightning, a reconnaissance variant of the Lockheed P-38 Lightning World War 2 fighter
A number of aircraft that first entered service with the U.S. Navy:
- Curtiss F4C, a 1920s version of the Naval Aircraft Factory TS biplane fighter
- Boeing F4B, a 1930s version of the Boeing P-12 biplane fighter
- Grumman F4F Wildcat, a carrier-based fighter aircraft in World War 2
- Vought F4U Corsair, a World War 2 fighter
- Douglas F4D Skyray, a carrier-based fighter/interceptor, first flight 1951
- McDonnell Douglas F-4 Phantom II, a supersonic fighter-bomber, first flight 1958

F4, Front-engine, four-wheel-drive layout in automotive design
MV Agusta F4 series, a series of motorcycles
USS F-4 (SS-23), a United States submarine that sunk near Honolulu harbor in 1915
F4 Darling Harbour ferry service, Sydney, Australia

F4, a paper size
F 4 Frösön, a former Swedish Air Force wing
f/4, an f-number of an optical system such as a camera lens
F-4 Object, or Rákosi bunker, a formerly secret nuclear shelter in Budapest, Hungary
Form F-4, an American form used to register securities
Nikon F4, a camera
F4, Albarka Air's IATA airline designator
F4, a tornado intensity rating on the Fujita scale
F04, ICD-10 code for organic amnesic syndrome, not induced by alcohol and other psychoactive substances
F4: an electrode site according to the 10-20 system (EEG).