Prerotation does not allow you to take off like a helicopter. All modern gyros have a prerotator - without one you'd need a very long take off roll to get the r

Prerotation does not allow you to take off like a helicopter. All modern gyros have a prerotator - without one you'd need a very long take off roll to get the rotor up to speed. The prerotator is definitely not capable of flight though, it's only good to get the rotor up to about 2/3 the speed needed to take off.