R13 or R-XIII may refer to:

Aviation

* Fouga CM.8 R13 Cyclone, a French sailplane *

Lublin R-XIII The Lublin R-XIII was the Polish army cooperation plane (observation and liaison plane), designed in the early-1930s in the Plage i Laśkiewicz factory in Lublin. It was the main army cooperation plane in the Invasion of Poland. Its variant Lubl ...

, a Polish army-cooperation plane *

Tumansky R-13 The Tumansky R-13 is a Soviet turbojet engine designed by Sergei Alekseevich Gavrilov. Design and development The Tumansky R-13 is a development of the successful Tumansky R-11 engine. It is a two-spool axial-flow turbojet featuring a new fiv ...

, a Soviet turbojet engine

Roads

* Jalan Gua Kelam, in Malaysia * R-13 regional road (Montenegro)

Other uses

R13 (drug) R13 is a small-molecule flavonoid and orally active, potent, and selective agonist of the tropomyosin receptor kinase B (TrkB) – the main signaling receptor for the neurotrophin brain-derived neurotrophic factor (BDNF) – which is under d ...

, an antidementia agent *

R-13 (missile) The R-13 (russian: ракета-13) was a submarine-launched ballistic missile (SLBM) developed by the Soviet Union starting around 1955. It was assigned the NATO reporting name SS-N-4 Sark and carried the GRAU index 4K50. History Development o ...

, a Soviet missile system * R13 (Rodalies de Catalunya), a regional rail line in Catalonia, Spain *

Chlorotrifluoromethane Chlorotrifluoromethane, R-13, CFC-13, or Freon 13, is a non-flammable, non-corrosive chlorofluorocarbon (CFC) and also a mixed halomethane. It is a man-made substance used primarily as a refrigerant. When released into the environment, CFC-13 h ...

, a refrigerant * Nyaneka language * R13: Extremely flammable liquefied gas, a risk phrase *

Rebellion R13 The Rebellion R13 is a sports prototype racing car built by French constructor Oreca on behalf of Swiss-based team Rebellion Racing. It is a variation of the Oreca 07, created to compete in the LMP1 class. It would later be renamed by Alpine to A ...

, a prototype racing car *

ROT13 ROT13 ("rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. ROT13 is a special case of the Caesar cipher which was developed in ancient R ...

, a simple cipher * , a submarine of the United States Navy * R 13, a Buffet Crampon clarinet model {{Letter-NumberCombDisambig