The Soviet Central Hydrofoil Design Bureau (CHDB), led by Alexeev, was the center of ground-effect craft development in the USSR; in Russian, the vehicle came to be known as an Ekranoplan (Russian: экранопла́н, экран "screen" + план "plane", from эффект экрана, literally in Russian 'screen effect' , for 'ground effect' in English). The military potential for such a craft was soon recognised and Alexeev received support and financial resources from Soviet leader Nikita Khrushchev.
Some manned and unmanned prototypes were built, ranging up to eight tons in displacement. This led to the development of the "Caspian Sea Monster", a 550-ton military ekranoplan.[3] Although it was designed to travel a maximum of 3 m (9.8 ft) above the sea, it was found to be most efficient at 20 m (66 ft), reaching a top speed of 300 kn (350 mph; 560 km/h) (400 kn (460 mph; 740 km/h) in research flight).
The Soviet ekranoplan program continued with the support of Minister of Defense Dmitri Ustinov. It produced the most successful ekranoplan so far, the 125-ton A-90 Orlyonok. These craft were originally developed as very high-speed military transports, and were based mostly on the shores of the Caspian Sea and Black Sea. The Soviet Navy ordered 120 Orlyonok-class ekranoplans. But this figure was later reduced to fewer than thirty vehicles, with planned deployment mainly in the Black Sea and Baltic Sea fleets.
A few Orlyonoks served with the Soviet Navy from 1979 to 1992. In 1987, the 400-ton Lun-class ekranoplan was built as a missile launcher. A second Lun, renamed Spasatel, was laid down as a rescue vessel, but was never finished.
Minister Ustinov died in 1985, and the new Minister of Defense, Marshal Sokolov, effectively stopped the funding for the program. Only three operational Orlyonok-class ekranoplans (with revised hull design) and one Lun-class ekranoplan remained at a naval base near Kaspiysk.
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