This watercraft began to be developed in the Soviet Union in the mid-60s of the last century. It was intended for sea walks. The engineers decided not to build another standard boat. They developed an original solution based on hydrofoils of a special configuration.
Already at that time, the hull was made of fiberglass, which made it possible to reduce weight and at the same time provide the necessary strength indicators. Another breakthrough solution at that time was a motor with an angular column. Due to this, the performance of the boat even after half a century is better than that of most modern watercraft of the same class. And fuel consumption is about half that of planing vessels.
A video from the YouTube channel "Crystal Yachts" details this Soviet model and shows the process of restoring the Nevka. It has a modern engine from Cummins and other equipment that increases the reliability of the system. You will not only learn a lot of useful information, but also see the testing process. This will help you understand how the boat can go faster and use less fuel.
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