US Army's future helicopters?

[El Cid]

Looks pretty slick! We'll see if it actually gets funded/fielded. I'm happy to see them departing from traditional helicopter configurations.

http://www.militarytimes.com/article...S04/310080043/

[J-Dub]

Waste of money. But the military industrial complex is going to fund itself....

[MistWolf]

Im wondering if or how these designs get rid of the inherent issue with helicopters and their limited top speed known as retreating blade stall?

The Sikorsky eliminates the problem from retreating blade stall by using two counter rotating main rotors. With a single MR, blade stall is a problem because the helicopter loses lift on the retreating blade side. By using two counter rotating MRs, the helicopter has an attacking blade on each side to counteract the effects of the retreating blades to maintain symmetry of lift. Blade stall isn't eliminated, it's counteracted and top airspeed can be increased safely