R-27 Zyb

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Simple scheme of an R-27 missile
Place of origin	USSR
Service history
In service	1968 - 1988
Used by	Soviet Navy
Production history
Designer	Makeyev Rocket Design Bureau
Designed	1962 - 1968
Manufacturer	Zlatoust Machine-Building Plant Krasnoyarsk Machine-Building Plant[1]
No. built	~1800 produced
Variants	R-27 R-27U R-27K
Specifications
Mass	R-27/R27-U: 14,200 kg (31,300 lb) R-27K: 13,250 kg (29,210 lb)
Length	R-27/R27-U: 8.890 m (29.17 ft) R-27K: 9.000 m (29.528 ft)
Diameter	R-27/R27-U/R-27K: 1.500 m (4.92 ft)
Main armament	R-27: Single warhead, 1 MT yield R-27U: Single warhead, 1 MT yield or 3x 0.2 MT Warheads
Payload capacity	R-27: 650 kg (1,430 lb) Single Warhead[1] R-27U: 650 kg (1,430 lb) Single Warhead or 3x 0.2 MT Warheads 170 kg (370 lb) each[1]
Propellant	N2O4/UDMH
Operational range	R-27: 2,400 km (1,500 mi)[1] R-27U: 3,000 km (1,900 mi)[1]
Flight ceiling	R-27: 620 km (390 mi)
Boost time	R-27: 128.5 Seconds
Accuracy	R-27: CEP 1.9 km (1.2 mi)[1] R-27U: CEP 1.3–1.8 km (0.81–1.12 mi)[1] R-27K: CEP 0.37 km (0.23 mi)
Launch platform	Yankee-class submarine

The R-27 Zyb (Russian: Р-27 «Зыбь», lit. 'Ripple') was a submarine-launched ballistic missile developed by the Soviet Union and employed by the Soviet Navy from 1968 through 1988. NATO assigned the missile the reporting name SS-N-6 Serb. In the USSR, it was given the GRAU index 4K10. It was a liquid fuel rocket using a hypergolic combination of unsymmetrical dimethylhydrazine (UDMH) as fuel, and nitrogen tetroxide (NTO) as oxidizer.^[1] Between 1974 and 1990, 161 missile launches were conducted, with an average success rate of 93%.^[2] Total production was 1800 missiles.

The R-27^[3] missiles were deployed on the Yankee I submarines, including the K-219.