The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. It was based on the Douglas WB-66D airframe, with the wing-mounted engines moved to the rear fuselage and making space for air compressors. The aircraft first flew on 18 April 1963 with NASA test pilot Jack Wells at the controls. [1] .

The X-planes are a series of experimental United States aircraft and rockets, used to test and evaluate new technologies and aerodynamic concepts. They have an X designator within the US system of aircraft designations, which denotes the experimental research mission.

诺斯罗普 X-21A是一种设计用来测试机翼层流效应控制的试验机。 X-21基于道格拉斯WB-66D机身建造。 采用嵌入机翼式引擎以便给 空气压缩机 腾出空间。 于1968年4月18日由NASA试飞员杰克·威尔斯驾驶进行了首飞。 尽管试飞顺利完成，但大量错综复杂的层流效应依旧导致了整个计划被终止。 [1] 层流控制是一项能够明显改善摩擦系数使得航空器大大降低油耗，提升航程的技术。 理论上讲，如果80%的机翼是由层状体组成则摩擦能减小25%。 机体表面与空气摩擦产生的 …

2023年5月2日 · Explore how a wing’s lift could be artificially boosted to reduce drag and increase performance, particularly in large, long-range aircraft designs—some of which would be supersonic. Drag reduction...

The pilot retracted the landing gear, and the plane skidded to a stop part way across the street at the west end of the runway. The concept started when Northop was developing the B-35 and B-49; and a celebrated Swiss expert on boundary layers, Werner Pfenninger (sp?) was hired to pursure the concept.

2011年7月7日 · Laminar-flow control is a technology that offers the potential for improvements in aircraft fuel usage, range or endurance that far exceed any known single aeronautical technology. In principle, if...

The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. It was based on the Douglas WB-66D airframe, with the wing-mounted engines moved to the rear fuselage and making space for air compressors. The aircraft first flew on 18 April 1963 with NASA test pilot Jack Wells at the controls.

The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. It was based on the Douglas WB-66D airframe, with the wing-mounted engines moved to the rear fuselage and making space for air compressors. The aircraft first flew on 18 April 1963 with NASA test pilot Jack Wells at the controls. Although useful testing was accomplished, the extensive maintenance ...

2023年12月10日 · In the early 1960s, amidst the dynamic landscape of aviation exploration, the Northrop X-21A emerged as a beacon of innovation. Tasked with a mission that went beyond the ordinary, this experimental aircraft sought to unravel the secrets of laminar-flow control, a technology promising transformative improvements in aerodynamic efficiency.

Media in category "Northrop X-21" The following 3 files are in this category, out of 3 total.