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U.S. Army Air Corps photo, dated January 19, 1942

Four North American BT-9 "Yale" basic trainers in flight. The BT-9 was a two-seat monoplane with enclosed tandem cockpits. It was of all-metal construction with removable fabric-covered side panels for easy maintenance. The engine and its accessories could be removed as a unit and changed in less than an hour. The BT-9C included a fixed forward gun that fired through the propeller arc, and a flexibly mounted gun in the rear cockpit. Note the old pattern U.S. Army Air Corps paint scheme.

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