[Photo group] Russian two-pedal submarine

According to MIT, a traditional small tourist submarine with a speed of two to three knots (4-6 km/h) requires a propulsion system with a power of 2.5 to 5Kw. The average propulsion power generated by a person cycling for one to four hours is about 0.2 to 0.4Kw, which means that a conventional propulsion system cannot drive a submarine. The submarine was developed using the principle of the Coanda Effect