Boeing X-32B JSF Demonstrator

Photograph: Boeing X-32B JSF Demonstrator by Paul Cremin on 19 May 2009 at the Patuxant River Naval Air Museum, Maryland, USA taken with a Canon EOS 350D 18mm, f9, 1/200 sec, ISO 100.

Following its initial phase of testing at Edwards Air Force Base, the X-32B was relocated to NAS Patuxent River in May 2001. Because Pax River is at sea level, it provided the ideal ambient atmospheric conditions needed to validate the aircraft's complex direct-lift system.

On 18 June 2001, the X-32B took to the air at Pax River for the first time. This flight also marked the aircraft's very first successful STOVL-mode landing, utilising its direct-thrust vectoring system to touch down well below conventional stall speeds.

Testing at Pax River highlighted significant engineering hurdles. The aircraft grappled with hot-gas ingestion, where superheated engine exhaust bounced off the runway and recirculated back into the main engine intake. This choked the engine, overheating it and causing a drop in vital thrust. To compensate for the loss of performance during hover demonstrations, Boeing teams had to actively strip away access panels and landing gear doors to shed enough physical weight for successful hovers.

Despite these struggles, the test team achieved its primary goals. On 1 July 2001, the X-32B completed three low-speed STOVL-mode take-offs at just 80 knots of forward speed, successfully satisfying the final U.S. government test requirements for the concept demonstration phase.

The Department of Defense ultimately selected the competing Lockheed Martin X-35 in October 2001, effectively ending the X-32 program.

After the JSF programme concluded, the lone X-32B airframe was preserved and officially transferred to the Patuxent River Naval Air Museum on 7 April 2005.

Its induction adjacent to NAS Patuxent River created a unique historical landmark. Because the museum already housed the Lockheed X-35C, the arrival of the X-32B made it the only global location where both competing Joint Strike Fighter prototypes are displayed together. Though the aircraft was left outdoors in an air park and suffered notable weather deterioration over the years, it remains a key artefact representing a pivotal chapter in naval aviation history.