Sikorsky SB-1 flies for first time

[noneofyourbusiness]

Originally Posted by SansAnhedral

The XH-59B was the intended follow on to the XH-59A, and it had a ducted pusher prop design going all the way back to ca 1980.




Interestingly, Igor died a year before the XH-59A first flew. He was quoted posthumously by Ben Kocivar in popular science's Sept 1982 piece on the "ABC copter" as having once said:




Genius indeed

Thanks for posting, very interesting! I was not aware of the XH-59B. From the picture, the pusher is counter-rotating and shrouded. So better than Raider/Defiant!
I can't blame Igor for that, or for being frustrated with coaxial designs.