First, it is necessary to consider the operating principle of Shkval. When an object moves in the water, it will create bubbles around it due to its motion, which is the phenomenon of cavitation in nature. The super-cavity is a more special case, when a large air bubble appears and covers the entire object, then the object will almost fly in the air due to the maximum elimination of friction. This is the principle applied on the VA-111 Shkval super-fast torpedo. The VA-111 Shkval was researched in the 1960s as a specialized weapon for attack submarines to fight nuclear submarines and enemy surface ships. On November 29, 1977, the VA-111 Shkval super-cavity torpedo was officially accepted into service in the combat component of the Soviet Navy. Shkval torpedo uses a solid fuel engine, the head is fitted with a special cavity-forming device. It is a thick elliptical piece of metal that is sharpened with an angle of inclination to the longitudinal axis, with a circular cross-section to create an angle of elevation. In fact, a foam generator is not enough, so the torpedo head adds foaming air ducts, the bubbles are generated by a gas booster. This allows to increase the volume of air bubbles and create bubbles that cover the entire torpedo body. The Shkval super-cavity torpedo has a speed of 93 km/h out of the launch tube and up to over 360 km/h when the engine is at full capacity, twice as fast as conventional torpedoes. The warhead of the VA-111 has a weight of 210 kg, enough to break a 10,000-ton destroyer in two with a single shot. However, it should be added that besides the advantages, the VA-111 also has deadly disadvantages, making its use in combat must be carefully considered. Firstly, Shkval’s range is too short, reaching a maximum of only 6,858 m, forcing the submarine to be close to the enemy to be able to strike. This is extremely dangerous because modern warships all have advanced sonar navigation systems and extremely powerful anti-submarine weapons. Second, it is the super-cavity technology that creates superior speed that makes the torpedo unable to establish two-way communication, when the radio signal is blocked from the outside, unable to penetrate the air bubbles. The torpedo relies on estimating target coordinates prior to launch, and its maneuverability is also extremely poor, as a sharp turn would break the supercavity bubble. Third, the secrecy of the Shkval torpedo is completely absent, because it creates extremely loud noises and forms a line of bubbles floating on the water that is easy to observe. Finally, the unit price of the Shkval torpedo is said to be significantly higher than the older generation types, while the advantages are not yet outstanding. For the above reasons, guided torpedoes such as TEST-71 or Type 53-65 combined with Kalibr cruise missiles will give modern submarines a higher combat capability, especially without tethering. it faces dangerous situations like when carrying the VA-111 Shkval. Currently, Russia announced that it has initially successfully tested the Shkval 2.0 variant with a longer range and controllability. If the above weapon is soon completed, it will really be able to replace the products of the old generation.

Recently, Subaru Forester 2022 has just been introduced to the Japanese market with some changes at the front of the car, in which the headlights, front bumper and grille are redesigned. In addition, the car also modified some other exterior details such as: New alloy wheels, Sport version uses round LED fog lights in front instead of vertical shape. On the other hand, the facelifted version of the Subaru Forester also has a new suspension system to help increase ride quality and improve comfort for passengers sitting in the cabin. Circular fog lights on the Forester Sport version. The mid-size crossover model has versions: Touring, X-Break, Advance and Sport; along with 3 new color options: Cascade Green Silica (green), Autumn Green Metallic (metallic green), and Brilliant Bronze Metallic (metallic bronze). The interior of the new Subaru Forester remains the same as before, but the Japanese automaker offers the crossover with new options, including two-tone Nappa leather upholstery. Subaru also updated the EyeSight Safety feature with a wider front-facing camera and new software to work in a variety of conditions. The two-tone interior compartment of the new Subaru Forester. In the domestic market, Subaru Forester 2022 is equipped with a 2.0L Hybrid e-Boxer engine with a maximum capacity of 150 horsepower and standard e-Active Shift Control. More powerful, Subaru will offer the Soprt version with a 1.8L turbocharged 4-cylinder engine with a maximum capacity of 174 horsepower and maximum torque of 300 Nm. All Forester versions use the signature Symmetrical All-Wheel Drive 4-wheel drive system.