The P-800 Oniks (Russian: П-800 Оникс; English: Onyx), also known in export markets as Yakhont (Russian: Яхонт; English: ruby or sapphire), is a Russian/Soviet supersonic anti-ship cruise missile developed by NPO Mashinostroyeniya as a ramjet version of P-80 Zubr. Its GRAU designation is 3M55. Development officially started in 1983, and by 2001 allowed the launch of the missile from land, sea, air and submarine. The missile has the NATO reporting codename SS-N-26. It is reportedly a replacement for the P-270 Moskit, but possibly also for the P-700 Granit. The P-800 was reportedly used as the basis for the joint Russian-Indian supersonic missile BrahMos.

Specifations:


Length: 8.9 m
Diameter: 0.7 m
Wingspan: 1.7 m
Weight: 3100 kg
Speed at altitude: 750 m/s (Mach 2.6)
Surface speed: Mach 2
Engine: ramjet, weight 200 kg, 4 tons of thrust
Range: 120–300 km
for the combined trajectory (the length of the final section 40 km) – 300 km
for low-altitude trajectory – 120 km
Flight altitude of 10,000–14,000 m
Warhead: 250 kg
Period of storage: 7 years
Fuel: kerosene T-6

Radar homing head

all-weather monopulse active-passive, with frequency hopping
Immunity: high, from active spoofing, dipole clouds
Range: 50 km active
Launchable sea state – up to 7 points
Warm-up time from power on: no more than 2 min
Current consumption at 27 V circuit: up to 38 A
Maximum angle of the target search: ± 45 °
Homing weight: 85 kg

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