The Northrop X-21

by Daniel Russ on July 24, 2018

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Wikipedia: ”

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] Although useful testing was accomplished, the extensive maintenance of the intricate laminar-flow system caused the end of the program.”



The X-21A was the only “X” aircraft that wasn’t built from scratch. Two of them were built from a pair of B-66 bombers.


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