The UH-60 Blackhawk design has been in service since 1979 and is due to be replaced

Самолёты на фотографии: Aircrafts on the photo: Sikorsky UH-60 Black Hawk / S-70 - СШАUSA - 1974

The V-22, produced by Bell Boeing, has been described as a first ‘operationalised’ tilt-rotor platform

Самолёты на фотографии: Aircrafts on the photo: Bell/Boeing V-22 Osprey - СШАUSA - 1989

Developed at considerable expense, the V-22 has seen some export success, such as with Japan

Самолёты на фотографии: Aircrafts on the photo: Bell/Boeing V-22 Osprey - СШАUSA - 1989

Tilt-rotor platforms do have some range and speed advantages over current conventionally configured helicopters

Самолёты на фотографии: Aircrafts on the photo: Bell/Boeing V-22 Osprey - СШАUSA - 1989

Both of the XV-15As outside at the NASA Dryden Flight Research Center in April 1981.
The development of the XV-15 tilt-rotor research aircraft was initiated in 1973 with joint Army/NASA funding as a 'proof of concept', or 'technology demonstrator' programme, with two aircraft being built by Bell Helicopter Textron in 1977

Самолёты на фотографии: Aircrafts on the photo: Bell XV-15 / Model 301 - СШАUSA - 1977

Manufacturer Bell went back to the drawing board for the V-280, using its experience in tilt-rotor technologies

Самолёты на фотографии: Aircrafts on the photo: Bell V-280 Valor - СШАUSA - 2017

If selected, delivery of the first unit to the US Army would take place in 2030

Самолёты на фотографии: Aircrafts on the photo: Bell V-280 Valor - СШАUSA - 2017