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The first YB-29 was converted to XB-39 Spirit of Lincoln
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The first YB-29 was converted to XB-39 Spirit of Lincoln
The first YB-29 was converted to XB-39, Spirit of Lincoln, to flight test the Allison V-3420 liquid-cooled engine
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Allison Converted Cooled Lincoln Liquid Spirit Test
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This photograph showcases the historic transformation of the first YB-29 bomber, which was later converted into the XB-39, affectionately known as the "Spirit of Lincoln." The YB-29 was originally designed as a transport aircraft by Consolidated Aircraft Corporation, but the United States Army Air Forces sought to explore the potential of the sturdy frame for other applications. In 1942, the Allison Engine Company proposed fitting the YB-29 with their new V-3420 liquid-cooled engine to enhance its performance and capabilities. The conversion process involved extensive modifications, including the installation of the powerful engine, new propellers, and redesigned cowlings. The XB-39, adorned with the iconic "Spirit of Lincoln" insignia, took to the skies for the first time on October 24, 1943, piloted by test pilot Bob Chilton. The successful flight tests paved the way for the development of the B-29 Superfortress bomber, which became a crucial asset in the United States military's arsenal during World War II. This photograph captures a significant moment in aviation history, as the YB-29, once a transport aircraft, was reborn as the XB-39, a high-performance testbed for the innovative Allison V-3420 engine. The Spirit of Lincoln's groundbreaking achievements continue to inspire engineers and aviation enthusiasts alike, reminding us of the limitless possibilities that lie within the realm of aviation technology.
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