you and wulf created an airplane, well enough 190, it was at the foka plant. that means, a transverse helicopter that has a beam here, here one propeller spins, here another propeller spins, this is a symmetrical design, in this case i am holding in my hands a kamovo helicopter, which always builds helicopters with such a symmetrical design, where two propellers rotate in different directions, and sikorsky dreamed of building a helicopter with one propeller. backwards, sideways, up, down, the only thing he couldn’t do was fly forward, for an as yet unknown reason, he sat down safely, behind the handle, naturally... he invented it himself, back, anywhere, and made quite a serious impression on those present, here i must say, another turn in... where a contract was concluded with the military department, the helicopter began to be mass-produced, it was used, in the forty-third year the aircraft designer founded own. well, for example, i’ll say during the years of the second world war, that is, from the thirty -ninth to this, 20 s-47 helicopters, here in front of you is the s-19 chekso,