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] .

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...

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.

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...

I never worked directly on the X-21 but was employed by Northrop during the period 1954 - 1957 doing basic research on laminar flow that led to the X-21. I was involved in development and testing of small models of wing slot configurations and later wind tunnel and flight tests of configuration so developed.

2025年3月21日 · Under research and development contracts with DARPA, Boeing and Lockheed Martin designed two X-planes as risk reduction for the Next Generation Air Dominance (NGAD) Platform. These aircraft first flew in 2019 and 2022, logging several hundred hours each.

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

Mikoyan-Gurevich MiG-21 was supersonic jet fighter from coldwar era. It had unique pencil like design with smooth lines great for high speed flight. New MIG-X21 is modern stealth version of this great aircraft designed to follow it’s origin but add modern touch while maintaining all advantages of origin aircraft.

2024年5月3日 · 6SIGMA JET KIT is a performance upgrade that not only increases power, but allows the engine to run cooler and at optimum, which increases engine component life. Designed to improve all RPM ranges of performance and a quicker throttle response, helps remove the bog. HOW IT WORKS.