The Speedmail was a single-seat biplane, with two large cargo compartments in place of a front cockpit.

The fuselage and tail unit were constructed from welded chrome-moly steel tube faired with wooden formers and fabric covered aft of the pilot's cockpit, and detachable aluminium alloy panels covered the fuselage forward of the cockpit.

It differed from previous Stearman aircraft by having a tailwheel instead of a tailskid due to its size and weight.

[1] Varney Air Lines' pilots found the M-2 difficult to handle and the Wright Cyclone engine was plagued with frequent maintenance issues.

The sole surviving Stearman M-2 Speedmail is on display in the collection of the Western Antique Aeroplane & Automobile Museum in Hood River, Oregon, U.S.A.[2] Data from Specifications of American Commercial Airplanes[3]General characteristics Performance