Boeing PB-1 Flying Fortress

The Boeing PB‑1 Flying Fortress was the United States Navy’s designation for the B‑17G bomber after it was transferred from the Army Air Forces in the early 1950s. Originally built as a strategic heavy‑combat aircraft during World II, the B‑17 earned a reputation for durability and long‑range capability. When the war ended, many surplus airframes were sold to civilian operators or placed in storage; the Navy acquired several to serve as long‑range patrol, transport, and early airborne early‑warning platforms. Modifications included the removal of most defensive armament, installation of radar antennas, additional fuel tanks, and reinforced floors for cargo. The PB‑1’s four Wright R‑1820‑100 Cyclone radial engines provided a cruising speed of about 230 mph and an endurance of over 12 hours, making it ideal for maritime reconnaissance over the Atlantic and Pacific. Though quickly eclipsed by purpose‑built patrol aircraft such as the P‑2 Neptune, the PB‑1 demonstrated the adaptability of existing designs and helped bridge the post‑war capability gap. Its service highlighted the importance of multi‑role conversions and cemented the B‑17’s legacy as a versatile workhorse in both combat and peacetime aviation history.

Boeing

Boeing PB-1 Flying Fortress

Classification

Design & Classification