The 1928 Simplex K-2-C Red Arrow (ATC 44) was designed by Omer Woodson with origins in the Woodson M-6. Of wooden construction it was Side-by-side canopied cockpit and semi-cantilever wing. The first few were powered by 75hp Kinner engines and priced at $4,495.
The 1928 Simplex K-2-S Red Arrow (ATC 43) was the same as the K-2-C, but with side-by-side open cockpit and priced at $4,115.
About 10 K-2s were built. Piloted by Dick Myhres, one, NC6504, won the 1928 California Class-A Race (Los Angeles-San Francisco) in a field of 16 aircraft in 3hr10min averaging 126mph.
Sioux Aircraft Corporation built aircraft under the name Sioux Red Arrow.
K-2-C Red Arrow
Engine: 90hp Kinner K-5
Wingspan: 34’4″
Length: 22’3″
Useful load: 570 lb
Max speed: 120 mph
Cruise: 108 mph
Stall: 37 mph
Range: 550 mi
Seats: 2
K-2-S Red Arrow
Engine: 90hp Kinner K-5
Wingspan: 34’4″
Length: 22’3″
Seats: 2
All Aero 