Caribous served in Vietnam with distinction, initially with the Army as CV-2s and later with the USAF as C-7s. C-7B 62-4155 at Ta Bong in February 1970 wearing the tail code of the 459th TAS.

Few US Caribou have been preserved: C-7B (formerly CV-2B) 62-4193 at the National Museum of the USAF, Dayton, Ohio.

Fine study of the first YAC-1, 57-3079. The fifth DHC-4 built, it still carrying its Canadian civil test registration, CF-LKF-X.
YAC-1 Caribou CF-LKF-X became the second 53-3079 and spent all of its career flying with the Army, serving as the 'Golden Knights' parachute team jump ship from 1974.

Few aircraft are as distinctive as the OV-1 Mohawk (15936 illustrated) with its bulged cockpit windows and triple fins. Of all the aircraft in the V-series, the Mohawk was ordered in the largest quantities.

Relatively few of the surviving Mohawks were retired to Davis-Monthan AFB, Arizona, after the aircraft was withdrawn front the VS Army.

When first conceived the Mohawk had a T-tail, and the mock-up was completed with such a unit prior to the adoption of the triple tail arrangement.

From the front, the new tail configuration, engines and level inner wings that distinguish the Buffalo from the Caribou are evident.

CV-7A 63-13686, the first Buffalo, demonstrating its short landing performance alongside the de Havilland Canada factory at Downsview, Ontario, May 1964.

Two XV-6As were transferred to NASA and were used for several research projects, including vectoring in forward flight (VIFF), which became a basic manoeuvre for future Harrier pilots.

Following participation in the tri-nation evaluation of the Kestrel, the US flew a further series of tri-service trials with the aircraft, including landings on the USS 'Independence'.

Four of the nine Kestrel FGA.Is of the Tripartite Evaluation Squadron in formation, displaying the specially-designed fin flash carried by the aircraft.

The XV-5B was the only example of the XV-4/5 series of VTOL research aircraft to survive its flying career, and was eventually handed over to the Army Aviation Museum at Fort Rucker, Alabama.

NASA undertook a long period of wind tunnel tests on the ducted fan lift system for the VZ-11/XV-5A prior to the first flight of the aircraft.

XV-8 Fleep был оснащен двигателем Continental IO-360A мощностью 210 л. с. (157 кВт), установленным в хвостовой части и приводящим толкающий винт.
In January 1962 the Ryan Model 164 was 'flown' in NASA’s full-scale wind-tunnel at Langley, Virginia. It differed from the XV-8A delivered to the Army in several ways, the most notable being that the XV-8A had twin 'butterfly' fins.