, the same focke who subsequently , together with wulf, he created an airplane, well, quite a famous, airplane during the great patriotic war, this same foki wulf 190, was at the foki plant, which also built helicopters, but he built transverse helicopters, now i’ll tell you i’ll explain what this is, which means it’s a transverse diagram, it’s a helicopter that has a beam here, one screw spins here, another screw spins here, this is a saos diagram, in this case i’m holding in my hands a kamov helicopter, which always builds helicopters like this ... dreamed of building a helicopter with one coaxial rotor, where on a helicopter, here it is shown, one rotor works, like this, he wanted to build a machine like this, in 1938 he began developing a new aircraft, a helicopter with with one screw. september 14 1939, the first experimental helicopter vs-300 took off , albeit on a leash, it had one peculiarity, it spun remarkably in place, it flew backwards, sideways, up, down, the only thing it couldn’t do was to fly forward, for an as yet unknown reason, they sat down safely, with the invento