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.

其中美国为了担心机场被干掉而研发了一款垂直起降飞机VZ-4，可以在较小区域内起降，而且还可以倒飞，具备很高的灵活性。 一日一帖，呈现未来最美的创意生活！ 微博关注@Max创意公元. 在冷战时期，各方面的科技突飞猛进，创新速度相比和平时期可谓一日千里，不少东西甚至现在看起来也类似神话。其中美国为了担心机场被干掉而研发了一款垂直起降飞机VZ-4，可以在较小区域内起降，而且还可以倒飞，具备很高的灵活性。, 视频播放量 11623、弹幕量 55、点赞数 6、投 …

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.

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。

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.

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.

I am designing a small tilt duct VTOL aircraft and could use help from any of the original designers or current enthusiasts who could send me any useful design information on the Doak VZ-4. Helpful information includes the inlet vane system, duct tilt design, ancillary hover stability augmentation, detailed flight characteristics, duct fan ...

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.

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。

VZ-4轻型坦克战斗重量3.9吨，车长3.2米，宽1.73米，高1.67米，最大行驶速度45千米每小时，最大行程170千米，能跨越1.5米宽壕沟，翻越约0.6米高的垂直障碍物，涉水0.8米深，车组2人，车内没有电台等设备，总产量74辆，部分外贸订单因为战争没有完成。