Good explanation of the needs for the Greyhound and CMV-22B here:
https://www.airspacemag.com/airspace...rey-180973131/
BTW, a bit confused by this little tidbit in Sandiego's post:
improved fuel dump capability
Why would a vertical takeoff aircraft require that? Surely if it's capable of a vertical takeoff, it can land at the same weight, or am I missing something?