R4, R04, R.4, R-4, or R/4 may refer to:
Military
Aircraft
*
Caudron R.4
The Caudron R.4 (officially Caudron 40 A.3) was a French World War I twin-engine biplane reconnaissance/artillery cooperation aircraft and the progenitor of a series of successful aircraft that filled a variety of roles with the French Aéronauti ...
, World War I French reconnaissance aircraft, first flown in 1915
* Curtiss R-4, air ambulance version of the American
Curtiss Model R utility aircraft, first flown in 1915
*
Sikorsky R-4
The Sikorsky R-4 is a two-seat helicopter that was designed by Igor Sikorsky with a single, three-bladed main rotor and powered by a radial engine. The R-4 was the world's first large-scale mass-produced helicopter and the first helicopter used ...
, American helicopter, first flown in 1942
Ships
* , Royal Canadian Navy destroyer
* , U.S. Navy submarine
Weapons
*
R4 assault rifle, produced by South African manufacturer Vektor
* R4 carbine, assault rifle used by the
Philippine Marine Corps
*
Bisnovat R-4
The Bisnovat (later Molniya) R-4 ( NATO reporting name AA-5 'Ash') was an early Soviet long-range air-to-air missile. It was used primarily as the sole weapon of the Tupolev Tu-128 interceptor, matching its RP-S ''Smerch'' ('Tornado') radar.
H ...
, Soviet missile
Other military
*
Plan R 4, the World War II British plan for an invasion of the neutral state of Norway in April 1940
Science
* R4, designation of
risk phrase {{short description, System of hazard codes and phrases for labeling dangerous chemicals and compounds
Risk and Safety Statements, also known as R/S statements, R/S numbers, R/S phrases, and R/S sentences, is a system of hazard codes and phrases for ...
"Forms very sensitive explosive metallic compounds"
*
R4 nuclear reactor, the fourth nuclear reactor built in Sweden
*
Exotic R4, in mathematics, a differentiable manifold
Transportation
Cars
* R4, abbreviation for
rear-engine, four-wheel drive layout
In automotive design, an R4, or Rear-engine, Four-wheel-drive layout places the internal combustion engine at the rear of the vehicle, and drives all four roadwheels.
This layout is typically chosen to improve the traction or the handling of e ...
*
R4, a sub-class of Group R rally cars
*
Jaguar R4, Jaguar Racing's car for the 2003 Formula One season
* McRae R4, a rally car designed in part by
Colin McRae
* Renault R4, alternative name for the
Renault 4
*
Suzuki GSX-R/4, a concept car made by Suzuki in 2001
Roads
* R4 ring road in
Ghent
Ghent ( nl, Gent ; french: Gand ; traditional English: Gaunt) is a city and a Municipalities of Belgium, municipality in the Flemish Region of Belgium. It is the capital and largest city of the East Flanders province, and the third largest i ...
, Belgium
*
R4 expressway (Czech Republic)
D4 motorway ( cs, Dálnice D4), formerly Expressway R4 ( cs, Rychlostní silnice R4) is a highway in the Czech Republic, southwest from Prague.
Sections of the motorway:
Unfinished sections
Images
File: R4 near Voznice (1).jpg , Highwa ...
*
R4 expressway (Slovakia)
*
R-4 motorway (Spain)
*
Radial Road 4 or R-4, an arterial road of Manila, Philippines
Other transportation
*
R4 (Canberra), a bus route in Canberra, Australia
*
R4 (New York City Subway car)
*
R4 (Rodalies de Catalunya), a commuter rail line in Barcelona, Catalonia, Spain
*
R4 41st Avenue RapidBus, an express bus service in Vancouver, BC, Canada
Video games
*
R4: Ridge Racer Type 4, a racing game for Sony PlayStation, developed by Namco
*
Rush Rush Rally Racing, a racing game for Sega Dreamcast, developed by Senile Team
*
R4 cartridge, a Nintendo DS flash cartridge
Other uses
*
BBC Radio 4
BBC Radio 4 is a British national radio station owned and operated by the BBC that replaced the BBC Home Service in 1967. It broadcasts a wide variety of Talk radio, spoken-word programmes, including news, drama, comedy, science and history fro ...
the premier BBC speech radio station
* R4, a building in the
Norwegian Government quarter (''Norw. Regjeringskvartalet'')
* Region 4, the
DVD region code
DVD region codes are a digital rights management technique introduced in 1997. It is designed to allow rights holders to control the international distribution of a DVD release, including its content, release date, and price, all according to ...
for most of Mexico, Central America, South America, Australia, New Zealand, Oceania
See also
*
4R (disambiguation) 4R may refer to:
* 4R Family restaurants in Northern California
* Galaxy 4R, a Panamsat-owned communications satellite
* Ponceau 4R, a synthetic colourant
* Hamburg International airline's IATA code
* Nachtjagdgeschwader 2, from its historic ''Ges ...
{{Letter-Number Combination Disambiguation