Martin N2M
The Martin N2M was a prototype American primary training biplane, built for the United [States Navy] by the Glenn L. Martin Company. It was never accepted by the Navy and only the prototype was built.
The prototype was designated N2M-1 by the United States Navy, and it first flew in 1924. The N2M-1 was based on the Martin [66 Night Mail] and was a biplane powered by a Wright-Hisso E-4 engine. It had two open cockpits in tandem for a crew of two.