5 pp
The Douglas M-2 was selected because it was far superior in strength, construction, performance, and flying characteristics to other aircraft entered in the Post Office Department’s competition for airmail airplanes. The M-2 was a single-bay biplane with the conventional form of axleless undercarriage. The fuselage, a truss of steel tubes and tie rods, was made in two detachable sections. The engi
#ld1-1643400021979-1643400030741-0