What are the structural characteristics of the Italian Otto Matt air-to-ship missile?

Automate missile adopts conventional aerodynamic configuration, with four truncated triangular swept leading edge stabilizing wings with small aspect ratio located in the middle and rear of the missile body, and four truncated triangular swept leading edge control surfaces located in the rear of the missile body. The wing and the tail rudder are in the same plane, and the missile body is pointed cylindrical. The head adopts martel AS37 air-to-ground missile structure, and the middle and tail adopt Otto Matt ship-to-ship missile structure. The interior of the missile adopts modular cabin structure, which is divided into four cabins from front to back: seeker cabin, warhead cabin, electronic equipment cabin, power plant cabin and rudder cabin.

The active radar seeker is installed in the head for terminal guidance. There are two kinds of radar seeker to choose from, one is X-band dual-axis monopulse radar seeker made by Thomson -CSF of France, and the other is ST-2 single-axis seeker made by SMA of Italy. The warhead cabin is equipped with a semi-armor-piercing blasting warhead with a weight of 2 10kg and a charge of 60 kg, which can penetrate the deck with a thickness of 38 mm, and adopts a trigger delay fuse and a proximity fuse. The electronic equipment cabin is equipped with an inertial navigation system for midcourse guidance, so that the missile can fly according to the predetermined target orientation. The radar altimeter controls the missile to be at a certain height, and turns on the terminal guidance active radar to search for the target when it is at a distance of 15 ~ 12 km. Once the target is captured, it will start the terminal guidance. The electronic equipment cabin is also equipped with radar altimeter, guidance computer, converter, junction box and regulator. 1 The turbojet main engine, oil tank, lubricating oil tank and steering gear are installed in the power plant and steering gear room. Four air inlets on the same plane as the wing are installed outside the shell, and the wing roots of the wing are fixed on the air inlets.

The main engine is ABIZO Ⅲ B single-shaft turbojet engine in Toubomeika, France, with a length of 1.36 1 m (including accessories), a maximum diameter of 4 10 mm, a weight of 1 15 kg, a diameter of an annular combustion chamber of 405 mm, and the fuel is made of centrifugal type. The maximum continuous cruise thrust is 323.62 N, the rotor speed is 32,000 radians/minute, the fuel tank is filled with 65 kilograms of kerosene, and the range is 200 kilometers after complete combustion. A combined compressor with one-stage axial flow and one-stage centrifugal compressor is adopted, with air flow of 6kg/s, compression ratio of 5.5∶ 1 and maximum rotation speed of 33,000 radians/minute when starting. The engine is started by a starter installed on the intake cone. After the engine works, the starter becomes a generator to supply power to the missile. In order to reduce the cost, the engine uses a large number of integral castings, and the working life of the engine is 30 hours.

The "Otto Matt" air-to-ship missile equipped with helicopter is the same as its ship type, with 1 solid rocket boosters tied to both sides of the missile body, with a diameter of 203mm. They are made by French Explosives Company and Hotchkiss-Blunt Company. They use polyurethane composite solid propellant, which lasts for 4 seconds and has a single thrust of 350 N, so that the missile can obtain a certain initial velocity when it is launched from the helicopter. After the booster is burned, it is separated from the missile body by explosive bolts.