Operational History
Deliveries of the first 25 PW-9s began on October 30, 1925. Boeing delivered a total of 114 PW-9s of all variants including prototypes to the United States Army Air Corps between 1925 and February 1931. Virtually all PW-9s served with overseas units, in Hawaii with the 5th Composite Group at Luke Field and later the 18th Pursuit Group at Wheeler Field, and in the Philippines with the 4th Composite Group at Clark Field, Luzon. PW-9s equipped the 3rd, 6th, and 19th Pursuit Squadrons between 1925 and 1931.
The FB-1, of which the Navy ordered 16 but received only 10 between December 1 and 22, 1924, was not modified for naval operations (for instance, no arresting hook), and was assigned to Marine Corps squadrons VF-1M, VF-2M, and VF-3M, being deployed to China in support of the Marine Expeditionary Force. Two additional planes—designated FB-2—were altered to operate on the carrier Langley with the addition of arresting gear and a straight-across axle for the landing gear. These went into service with VF-2 in December 1925. Generally satisfactory results led to an order for 27 FB-5s, which became the Navy's first fighters intended specifically for carrier operation. They were upgraded to 525 hp Packard 2A-1500 engines, and sported a row of hooks on the bottom of the axle, used to guide the plane via cables on the deck. The FB-5 first flew October 7, 1926 and was delivered to the Navy beginning in the following January, carried on barges in Puget Sound from Boeing's factory to Langley anchored in Seattle's harbor. Hoisted aboard, their first official flights were from the carrier's deck.
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