Doak 16 VZ-4DA
The Doak Model 16 was the first Vertical Take Off and Landing (VTOL) aircraft to demonstrate the 'tilt duct' concept. The concept was proposed to the military in the early 1950s by Doak Aircraft Company. It would meet the Army's desire for a utility and observation vehicle with the VTOL capabilities of a helicopter, with the maneuverability of a higher speed fixed-wing aircraft. In 1956, the Transportation Research and Engineering Command purchased one Doak 16 and designated it VZ-4DA. The Doak made its first flight in February 1958.
The research aircraft had ducted propellers on each wing tip which rotated 90 degrees to shift from vertical take-off and hovering to horizontal flight. The Doak 16 demonstrated conventional and vertical flight in addition to short take-offs and landings. Although the aircraft exhibited some undesirable flight characteristics, only a few were considered fundamental to the tilt-duct system, and those were easily solvable.
The VZ-4 was the end product of Doak's many years of research and development in the VTOL field, and the aircraft proved reasonably useful in exploring the military potential of non-helicopter VTOL vehicles. After three years of joint testing by the Army and NASA, the sole VZ-4, Number 56-9642, was withdrawn from Army inventory. It was subsequently used solely by NASA before being turned over to the Transportation Museum in 1973.
Erected by US
this page online
Topics. This historical marker is listed in these topic lists: Air & Space • Military • War, Cold. A significant historical month for this entry is February 1958.
Location. 37° 9.845′ N, 76° 34.583′ W. Marker is in Newport News, Virginia. It is in Fort Eustis. It can be reached from Washington Boulevard just north of Jefferson Avenue, on the right when traveling north. Touch for map. Marker is at or near this postal address: 321 Washington Blvd, Fort Eustis VA 23604, United States of America. Touch for directions.
Regionally, this marker is on Virginias Peninsula, in Hampton Roads, in Coastal Virginia, and in the Hampton Roads Metropolitan Area. It is also in the American South, specifically in the Upper South, in the Tidewater, and on the Eastern Seaboard. Globally, it is in the North Atlantic Region, North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once the territory of the Mississippian Culture, one of the original Thirteen Colonies, one of the Confederate States of America, and the Antebellum South.
Other nearby markers. At
Credits. This page was last revised on February 1, 2023. It was originally submitted on February 28, 2021, by Devry Becker Jones of Washington, District of Columbia. This page has been viewed 328 times since then and 27 times this year. Photos: 1, 2. submitted on February 28, 2021, by Devry Becker Jones of Washington, District of Columbia.
