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 __NOTOC__
The Curtiss Model R was a utility aircraft produced for the United States Army and Navy during World War I. It was a conventional, two-bay biplane with slightly staggered wings of unequal span. The aircraft was provided with two open co ...
utility aircraft, first flown in 1915
*
Sikorsky R-4, American helicopter, first flown in 1942
Ships
* , Royal Canadian Navy destroyer
* , U.S. Navy submarine
Weapons
*
R4 assault rifle
The Vektor R4 is a 5.56×45mm assault rifle designed in 1979 based on the IMI Galil rifle. It entered service as the standard service rifle of the South African Defence Force (SADF) in 1980. The R4 replaced the R1, a variant of the 7.62×51mm ...
, 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
Plan R 4 was an unrealised British plan to invade Norway and Sweden in April 1940, during the Second World War. As a result of competing plans for Norway and a German invasion of Norway the same month, it was not carried out as designed. Simil ...
, 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
History
R4 nuclear reactor was a nuclear reactor built at Marviken, Vikbolandet and the fourth nuclear reactor built in Sweden. It was heavy water moderated and intended for the dual role of 130MWe of power generation as well as plutonium
...
, 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
The Renault 4, also known as the 4L (pronounced "Quatrelle" in French), is a small economy car produced by the French automaker Renault between 1961 and 1994. Although the Renault 4 was marketed as a short station wagon, its minimal rear overhang ...
*
Suzuki GSX-R/4, a concept car made by Suzuki in 2001
Roads
* R4 ring road in
Ghent, Belgium
*
R4 expressway (Czech Republic)
*
R4 expressway (Slovakia)
R4 is an expressway ( sk, rýchlostná cesta) in the north–south direction in eastern Slovakia.
It goes from border with Poland and ending at border with Hungary. It goes through or around SvidnÃk, PreÅ¡ov and KoÅ¡ice.
The section between PreÅ ...
*
R-4 motorway (Spain)
The Autopista Radial R-4 is a Spanish radial motorway originating from Madrid and passing through Valdemoro, connecting to the N-400, AutovÃa A-40 and Autopista AP-36.
The road is managed by Spanish Operator Cintra
Cintra, S.A. (Concesione ...
*
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 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
