I loved the “BAT” iirc design that was pictured in Aviation Week. IIRC, it was rapidly determined that the Tilt-rotor variant could not meet standards at the required weight. If the weight were allowed to be somewhat higher…
There was also a proposal for a tiltrotor attack helicopter, I remember it being drawn with Mavericks, a Longbow radar on the top of the wing…
Hush-Kit 
I loved the “BAT” iirc design that was pictured in Aviation Week. IIRC, it was rapidly determined that the Tilt-rotor variant could not meet standards at the required weight. If the weight were allowed to be somewhat higher…
There was also a proposal for a tiltrotor attack helicopter, I remember it being drawn with Mavericks, a Longbow radar on the top of the wing…