Originally Posted by
SASless
Sans....I was at West Palm Beach back when the ABC was flying.....that is where I first met Nick Lappos who was one of the Test Pilots.....that was back in 1979 or so.
If Sultan can claim the V-22 as new concepts despite all that went before it clear back to the 1950's.....I would suggest you can give me pass on this.
The ABC did not have a pusher prop.....that came from Piasecki which had that on a Blackhawk airframe a few years back.
Notice in that PopSci article the illustration on page 70. XH-59B was supposed to have that ducted pusher, dreamed up all the way back in the late 1960s. After seeing the A model in action, the Army was uninterested in pursuing the concept further.
As far as the rigid rotor coax in general? The Hiller boys were way ahead of the curve in '45 (and apparently the X2 moniker as well)
