Ones here at Alabama its called the Cheyenne and did about 240 kts, the rotor was just to get it airbourne, it had wings and used the prop at the rear to achieve forward airspeed. . .. .The problem was that the USAF wouldn`t let us have a CAS aircraft !. .. .The metalurgy wasn`t really up to it either it was a 1960/70 project.. .. .Shame really would have been fun, . .. .Oh and ejector seats to !