Was the Horten Ho 229 the world's first stealth aircraft?

Wars & Conflicts · Published 16 October 2026 Swipe more like this →

In short: In the closing months of WWII, a German flying wing prototype emerged that seemed to defy radar. While legends claim it used charcoal-infused glue to hide from British sensors, the truth behind this jet-powered pioneer is a complex mix of aerodynamic brilliance and unproven myths.

The Horten Ho 229, also known as the H.IX, was a radical response to a 1943 requirement from Luftwaffe head Hermann Göring. Known as the '3×1000 project,' the goal was a bomber capable of carrying 1,000 kilograms over 1,000 kilometres at speeds of 1,000 kilometres per hour. To achieve this, brothers Reimar and Walter Horten utilized a flying wing design to minimize drag, a concept they had refined since the 1930s with gliders like the H.IV.

The aircraft's construction was a hybrid of advanced and rudimentary materials. Its center section featured welded steel tubing up to 160 mm in diameter, while the outer wing spars were made of pine and skinned with thin plywood. To manage the lack of a vertical stabilizer, which is essential for preventing uncontrolled sideslips, the designers implemented split ailerons to provide yaw control. While this reduced drag, it necessitated more active pilot input.

A persistent myth suggests the Ho 229 was a stealth pioneer using carbon-based materials to absorb radar. Reimar Horten later claimed he intended to use charcoal dust in the wood glue to evade the British 'Chain Home' radar system. However, investigations by the Smithsonian and Northrop Grumman engineers found no evidence of charcoal or carbon black in the V3 prototype. While the flying wing shape naturally offers a smaller radar cross-section by eliminating vertical surfaces, simulations show that a low-flying Ho 229 would still have been detectable by contemporary radar systems.

The project's end was marked by tragedy and capture. The second prototype, powered by Junkers Jumo 004 engines, crashed in February 1945, killing test pilot Leutnant Erwin Ziller. The nearly complete V3 prototype was captured by the US Third Army in April 1945 and eventually moved to the United States under Operation Paperclip. Today, the surviving V3 airframe is on display at the Smithsonian National Air and Space Museum.

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