The 1923 Swanson-Freeman SS-4 N3522 c/n 4 was designed by Edgar Freeman and Swen Swanson as a two-place open cockpit biplane with I-struts and dual controls.
The first flight was on 11 November 1911, piloted by Ellred Callender.
It was still on the active register in 1936.
It was seen c.1928 as Span Wings 32 with a90hp Curtiss OX-5 engine and registered NX3522, but with no explanation for that model designation.
It was last known stored in a museum near the University of South Dakota.
Engine: 80hp LeRhône
Wingspan: 28’0″
Length: 21’7″
Useful load: 570 lb
Max speed: 95 mph
Stall: 35 mph
Seats: 2
All Aero 