 P 8-class torpedo boat is another development of P 6-class TB, which is a P 4-class with hydrofoil added.Although only a small number was built for the Soviet Navy, a large number of its derivative was built by Chinese as Type 025-class torpedo boat.P 10-class torpedo boat was an experimental boat based on P 6-class, and it was a P 6-class powered by gasturbine engine to evaluate its feasibility of gasturbine engine for maritime use.