[2] One of these was the American Albatross B-1[3] of 1928, a high wing braced monoplane with a single engine producing 260 hp (190 kW) and with accommodation for six passengers.

[7] The Challenger's wing was built in two parts, both rectangular in plan out to semi-elliptical tips, which met on top of the fuselage and were mounted with 1.5° dihedral.

One of the three 180 hp (130 kW), six-cylinder Curtiss Challenger radial engines was in the nose under a wide-chord fairing.

The pilots occupied an enclosed cockpit, placed high and just ahead of the wing leading edge, with side-by-side seating and dual control.

Cabin and cockpit were accessed by a door on the port side, equipped with a built-in ladder, via a compartment containing a curtained-off lavatory and a luggage space.

The wheels had independent Bendix brakes and were almost entirely enclosed in large dural tube, fabric covered fairings.