But it seems somewhat familiar. From almost 60 year ago:
https://en.wikipedia.org/wiki/...
With almost identical performance specifications. This idea of what is called a "compound helicopter" which combines mostly-helicopter design with wings and forward propulsion of a conventional airplane . Helicopters tend to be limited in speed because with forward speed, one blade it swinging forward and getting the forward speed + the speed of the rotor on one side, and forward speed - speed of the rotor on the other. This means that it gets way more lift on the forward0travelling side and way less on the trailing side. This would roll it to one side, and requires the blade pitch angle to be driven up and down as the blade rotates.
Putting on a small wing and conventional propellor (or two) allows some roll control and some lift and unloads the demands on the rotor to something practical. 220 knots (about 250 mph) is going to be about the limit.
Beyond that, the entire idea becomes impractical and other deigns like tiltrotors (V-22 Osprey) and dual mode/vectord thrust jets (Harrier, F-35B) are required.