The 1925 five-seat S-31, with a 200hp Wright J-4 Whirlwind engine, was used by the Fairchild Company for aerial photo-mapping work in South America.
Up to four passengers, or photographic equipment, could be carried in the semi-closed centre cabin.
During flight testing, the S-31 climbed to 4680m in 47 minutes with a pilot, two passengers and fuel for four hours of flying.
The sole example built was shown in a publicity photo shows it with a machine-gunner in the rear cockpit, suggesting plans for a military export version.
S-31
Engine: 200hp Wright J-4
Wingspan (upper): 45’0″
Wingspan (lower): 32’0″
Length: 26’0″
Useful load: 1200 lb
Max speed: 124 mph
Cruise: 110 mph
Stall: 35 mph
Range: 500 mi
Ceiling: 15,000′
Seats: 3
All Aero 