Osa-M antiaircraft missile system

"The Wasp-M is fully unified with the Wasp military complex for missile 9M33 and 70% for control systems.

The control system (see photo) consists of target detection, target tracking and sighting stations for the missiles, command transmission, a console for three operators, and interface and drive control devices. Guidance of missiles at the target is provided by radio command method. Radar systems of the complex operate in a centimeter range and contain noise protection devices. In Osa-M complex it is also possible to receive target designation from the ship's detection and target designation system.

A distinctive feature of the complex "Osa-M" is that it can independently solve the problem of target detection, for which the control system includes a radar station that provides target detection, flying at an altitude of 3.5 - 4 km at a range of 25 - 30 km and at high altitudes at a range of 50 km. The coordinates of the detected and identified target are sent to the tracking station, where they are used to guide the antenna post in the bearing and search the target in the corner of the place. Due to the combination of detection and target tracking modes in one system the reaction time of the complex is reduced by 6 - 8 seconds.

The 9M33 is a single-stage rocket with a dual-mode solid propellant engine. The starting charge is telescopic and the marching charge is single-channel. The missile is configured according to the aerodynamic scheme "duck", ie has the steering wheel at the bow. The four wings are structurally combined into a wing unit, which is mounted movably relative to the hull and rotates freely in flight.

Launching unit ZIF-122 developed by the Central Design Bureau-7 under the guidance of V.A. Khromtsov. In the hiking position, the lifting unit with launching beams and rotating part is located under the deck in a special cellar, which houses the ammunition. Guide beam in the lowered state is located vertically. The missiles are placed on four drums, and five missiles can be placed on each drum. When switching to the combat position, the lifting part of the booster is lifted together with two missiles. After the first missile is launched, the drum is rotated to provide access to the line of charge for the next missile. After the second missile is launched, the launch beams automatically become vertical, turn to the nearest pair of drums, and the lifting part of the booster is lowered after the next two missiles. The PU recharging time is in the range of 16-21 seconds. Speed - 2 shots per minute on air targets and 2.8 shots per minute on surface targets, time to transfer fire to another target is 12 seconds. Weight of PU without ammunition is 6,850 kg.

After leaving the launcher and automatic (uncontrolled by radio commands) flight, the missile is "captured" by the missile sighting station and brought to the target. Guidance of the missile with the required accuracy is carried out using the command method of flight control on one of the methods implemented in the system: "three point" or "half straightening" on air targets, "three point in the NLC mode" on low-flying targets and the method of guidance on surface targets.

When the missile approaches the target, a command is given to detonate the radio fuse and remove the last stage of the fuse. On this command, the radio fuse begins to emit radiomagnetic pulses. At a certain level, the signals reflected from the target are detonated. According to the tactical and technical requirements, the maximum range of the fuse operation is 15m. In case the missile passes the target, the command to disable the radio fuse is given to the missile. The missile is brought to the water level and self-destructed by detonating the combat unit from a clockwork mechanism or destroyed by a water strike.