After decades shrouded in mystery, the NT-43A, known as RAT55, begins to show signs of a new operational phase.
The United States Air Force’s top-secret aircraft was seen supporting the launch of NASA’s Artemis II mission, indicating that its role may be evolving into new strategic functions, possibly beyond its traditional activities.
Historically used to measure radar signatures from stealth aircraft, the RAT55 is a unique platform in the world. Equipped with advanced radars and specialized sensors, the jet can accurately analyze how stealth planes are detected, providing crucial data for the development of low-observability technologies. Its in-flight data collection capability significantly increases the accuracy of these tests.
Even with its importance, the aircraft faces limitations due to its age. Derived from an old model of the Boeing 737, the NT-43A has already been in operation for five decades, which raises doubts about its longevity. Despite this, there is still no confirmation of a direct replacement, keeping RAT55 as a key part in highly sensitive tests.
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Now, with the possibility of taking on new roles — including supporting space missions — the future of RAT55 could be more active and less secretive. If this is confirmed, the aircraft could no longer be just a “legend” among secret programs and start playing a more visible role in advanced technological operations, especially in a scenario of growth in new stealth platforms and military drones.
Source: The War Zone | Photo: X @JasonZicker | This content was created with the help of AI and reviewed by the editorial team
— Jason (@JasonZicker) May 22, 2025
