Doak VZ-4 - Wikipedia
The Doak VZ-4 (or Doak Model 16) was an American prototype Vertical Takeoff and Landing (VTOL) aircraft built in the 1950s for service in the United States Army. Only a single prototype was built, and the U.S. Army withdrew it from active trials in 1963.
实验性可转换Doak VZ-4（美国） - Военное обозрение
多克飞机模型16 / vz-4项目是美国航空业首次尝试用旋转环形螺旋通道建造垂直起飞飞机。 该项目的结果是构建了一个原型，该原型在许多测试中使用并允许收集许多重要信息。
Vertipedia - Doak 16/VZ-4 - Vertical Flight Society
The Doak 16, which received the Army designation VZ-4, was built in 1957. It was 32 ft long, had a gross weight of 3,200 lb, a tandem two-seat cockpit, and a 16 ft wingspan. Each wing ended in eight-bladed 4 ft wide propellers within tilting ducts; they were powered by a single 860 bhp Lycoming YT53 engine.
DOAK Model 16 VZ-4 VTOL Aircraft | Strange Vehicles - Diseno-art
The DOAK Model 16, or VZ-4 as it was perhaps better known, was a prototype VTOL aircraft developed by the Doak Aircraft Company for the U.S. Army during the '50s and early '60s. The aircraft had been proposed to the U.S. Army in 1950 by the company's founder, Edmund R. Doak.
DOAK VZ-4 美陆军垂直起降飞机测试 - 哔哩哔哩
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Doak’s Prototype VTOL Aircraft From The 1950s - Jets ’n’ Props
2022年12月26日 · The Doak Model 16, also known as VZ-4, arguably had the most elegant appearance among a string of experimental non-helicopter VTOL vehicles tested by the US Army throughout the 1950s and early 1960s. At any rate, it looked the most-plane like of them all.
Doak VZ-4 | Military Wiki | Fandom
The Doak VZ-4 (or Doak Model 16) was an American prototype VTOL aircraft built in the 1950s for service in the United States Army. The aircraft was originally powered by an 840 shp (630 kW) Lycoming YT53 turboprop engine.
Doak VZ-4 VTOL - YouTube
The Doak VZ-4 (or Doak Model 16) was an American prototype VTOL aircraft built in the 1950s for service in the United States Army. The aircraft was originally powered by an 840 shp (630 kW)...
Doak VZ-4 - 照片和视频 - NET-MAQUETTES
2019年1月6日 · 这 多克VZ-4 （或Doak型号16）是美国原型垂直起飞和降落（VTOL）飞机建于20世纪50年代，为美国陆军服务。只有一个原型被制造，美国陆军在1963年退出了积极的试验。
Doak’s One-Off: The Doak VZ-4DA - HistoryNet
2017年3月8日 · Fort Eustis’ VZ-4DA, also known as the Model 16, was one result of this era. Edmond R. Doak, president of Doak Aircraft Company in Torrance, Calif., had been experimenting with ducted fans and similar air-moving concepts since 1935, and he proposed a VTOL aircraft to the U.S. military as early as 1950.