The Sikorsky XBLR-3 was one of the most ambitious American bomber projects of the 1930s. Although it never advanced beyond the design and mock-up stage, the aircraft remains a fascinating chapter in military aviation history. Developed by Sikorsky Aircraft as part of the United States Army Air Corps' secret long-range bomber program, the XBLR-3 represented an early attempt to create an intercontinental heavy bomber capable of unprecedented range and endurance. Today, the Sikorsky XBLR-3 is remembered as a visionary aircraft concept that showcased advanced engineering ideas long before they became standard in strategic bomber design. Sikorsky XBLR-3 What Was the Sikorsky XBLR-3? The Sikorsky XBLR-3 was an experimental long-range heavy bomber proposed in 1935 for the United States Army Air Corps' classified “Project D” competition. The program sought to explore the future of strategic bombing by evaluating aircraft capable of carrying heavy payloads over extremely long distan...