Its engine is based on the screw-nut principle
The new development of the capital's inventor will make it possible to become a faster and more efficient conqueror of the underwater depths. The other day he received a patent for a device for high-speed movement of a person in water.
An underwater scooter is quite simple in its design. Basic elements — this is a body equipped with a belt, on which the swimmer lies, a drive shaft with a carriage placed on it and a propeller. The carriage is a nut with pedals mounted on it, and the drive shaft — threaded rod. The shaft is attached to the body through a bearing, so that it can rotate, while the platform on which the swimmer lies remains horizontal. On the opposite side of the shaft there is a propeller closed with a protective ring: it protects the blades from contact with surrounding objects.
The device will work on muscle traction. In order to travel underwater, a person will need to buckle up to the body, insert their feet into the carriage pedals and make reciprocating movements with their feet. Moving along the threaded drive shaft, the "nut" carriage will unwind it. In this case, the carriage will be equipped with a mechanism that will allow not to transmit the reverse movement, that is, when the swimmer straightens his legs, the shaft will begin to unwind, and when it is bent, it will not spin in the other direction. According to the author, such a device can allow you to develop a pretty good speed. He believes that someday it may find application in sports, and now it could be used in the maintenance of offshore structures and ships.