In 1933 Darwin F Swanson built the Swanson B-4-T N13619. A single-place open cockpit monoplane, it was powered by a 55hp Swanson engine, later, a 50hp Ford.
Inter-Wars
Swanson, Darwin F
1933
Murray IA.
USA
1938
OR.
USA
Built the Swanson B-4-T in 1933.
Built the C-O-2 in 1938.
Swanson-Freeman SF-4

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
Swanson-Fahlin SF-2 / Fahlin Plymocoupe

Designed by Swen Swanson and Ole Fahlin, the 1935 Swanson-Fahlin SF-2 was a two-place cabin, high wing monoplane, registered N365 c/n SF-2.
Powered by a Plymouth PJ auto engine (not inverted as often thought) with a geared propshaft, it became known as Fahlin after Swanson’s death from pneumonia in Feb 1935 during construction.
Sold in Novrmber 1935 after it failed to meet DoC contract specifications and, fitted with extra fuel tanks as Sea-Aska, it crash-landed in fog at Juneau AK in September 1936 during an attempted non-stop Anchorage-Seattle flight—pilot Russell Owens telegraphed his backers: “Sea-Aska on her asska in Alaska.”
Destroyed in a 1938 hangar fire in Juneau.
Although Plymocoupe is often thought to be an Nicholas-Beazley product, none was ever produced by that company. Fahlin went on to fame and fortune with his propeller business.
Swanson-Fahlin SF-2
Engine: 82hp 6-cylinder Plymouth PJ
Wingspan: 32’0″
Length: 17’9″
Useful load: 536 lb
Max speed: 120 mph
Cruise: 100 mph
Stall: 40 mph
Range: 500 mi
Ceiling: 16,000′.
Seats: 2
Swanson-Fahlin SF-1

Based on Swanson W-15 design, the 1934 Swanson-Fahlin SF-1 was a two-place cabin, high-wing monoplane, powered by an 85hp Pobjoy R engine. It first flew in April 1934, registered NX271Y c/n 1.
It was repowered c.1937 with an 85hp Continental A-85.
Disposition after c.1940 is uncertain, reportedly was stored in a hangar on a field taken over by the military, who consigned it to the scrap pile. Despite many references to a trio of Swanson and Fahlin-designed planes built by Nicholas-Beazley Co, only the SF-1 and SF-2 were built at the N-B plant, and those by Swen Swanson in rented space.
Engine: 85hp Pobjoy R
Wingspan: 28’0″
Length: 21’10”
Useful load: 500 lb
Max speed: 130 mph
Cruise: 104 mph
Stall: 42 mph
Seats: 2
Swanson Airplane Co SS-4
Built circa 1922, the Swanson SS-4 was a two-place side-by-side open cockpit biplane. With I-struts and powered by a 90hp Curtiss OX-5, the wingspan was 34’0″.
It was auctioned from a museum estate in 1995.
Swanson Airplane Co SS-3

In 1922 Swen Swanson built the Swanson SS-3 single-place, open cockpit biplane with an all-wood monocoque fuselage.
The SS-3 first flew on 24 September 1922, piloted by Vern Roggers.
The design evolved into Lincoln Sportplane when Swanson went to Lincoln-Standard Co.
Engine: 28hp Lawrance
Wingspan: 18’9″
Length: 15’0″
Useful load: 200 lb
Max speed: 90 mph
Stall: 40 mph
Seats: 1
Swanson Airplane Co W-15 Coupe
Designed by Swen Swanson the 1931 W-15 Coupe was a two-place cabin, high-wing monoplane, certified under ATC 2-312.
With a cantilever wing it was priced at $4,450, $4,985 with starter, battery and generator, lights, steel prop, added instrumentation.
One was built, registered NC10546 c/n 1.
The design carried on into the Swanson-Fahlin SF-1.
Engine: 110hp Warner Scarab
Wingspan: 34’4″ Length: 25’0″
Max speed: 125 mph
Cruise: 95 mph
Stall: 40 mph
Range: 625 mi
Seats: 2
Swanson Airplane Company Inc
1917: Swen Swanson,
Williamsburg VA.
USA
1922: Univ of South Dakota,
Vermillion SD.
USA
S. S. Swanson was an amateur constructor, and in 1923 co-producer of Swanson-Freeman light biplane.
1925: Swanson-(Edgar) Freeman,
Vermillion SD.
Later worked with Lincoln-Standard Aircraft Corporation.
Swanson Airplane Company Inc incorporated 1930, and developed Swanson Coupe two-seat high-wing cabin monoplane.
1931: Rockford IL.
Swanson Aircraft Co Inc,
Hopewell VA.
1934: Swanson-(Olaf “Ole”) Fahlin,
at Nicholas-Beazley Airplane Co,
Marshall MO.
1935: Fahlin Mfg Co (propellers).
Swanson Flyabout A-12
In 1935 Carl Swanson built the Flyabout A-12 registered N14833 c/n 2505.
It was a single place, open cockpit, high wing monoplane, powered by a 30hp Heath-Henderson.