Martin Models 117, 119, 120 and 122

PM-1, 1B, and 2, XP2M-1, P3M-1 and 2 Patrol Planes
PM-1/PM-2 Variants/Specifications

Glenn Martin predicted correctly that the future of airframe manufacturing lay in the new aluminum structures. Taking advantage of aviation's "Lindbergh boom" to sell his old factory at a good price, he built a new one designed from the first for metal construction.

The Navy greeted Martin's new venture with a lavish string of orders for flying boats during the heady spring and summer of 1929. The existing stock of World War I flying boats was wearing out, just as Navy planners were giving increasing emphasis to their role in a possible confrontation with Japan in the Pacific.