having 2 pusher props turning nice and slowly,and even having them contra (counter) rotate so there is no turning/torque moment on the airframe,now that was good design philosophy in the early 1900's.
........although the idea was even then at least over 50 years old: for example see Stringfellow's flying model of 1848 amongst other pioneers.
There is very little in the world that is new
The best designers usually collect all the good ideas together and make them work.
But seriously - all I meant was that the prop drive design suited the Wrights aircraft very well !
rgds LR