The Model 80 was a developmental off shoot of the Model 4. It was powered with a 420 HP Pratt & Whitney "Wasp" engine. It was one of the cleanest old-style biplanes ever built. This airplane marked the end for big biplanes in US commercial aviation. It had a rear cockpit enclosure for the pilot.

Identical to the Model 80 but with an enclosure covering both cockpits, it had increased fuel capacity with a range of 1000 miles at cruising speed. It was demonstrated as a seaplane in South America and was eventually sold to the Mexican Government.