Sikorsky X2 coaxial heli developments.

[Old Rusty]

X2 pusher prop

First post to a great site.

I've got a question for all you smart folks and I realize that I may not have the proper knowledge to word this question so please ignore my ignorance.

The question is-looking at the Sikorsky X2 aircraft can anybody estimate how much thrust that pusher prop is creating? If so, can anybody tell me the formula of how you figure the thrust of a propeller?

Thanks, MjH