All Aero

First flying on 25 October 1936, the three-seat, open cockpit Spartan C3 was built with various engines.

Designed by Willis Brown, the 1928 125hp Ryan-Siemens powered C3-1 (ATC 71) was priced at $5,200. About 100 were built.

Four of the 1928 C3-2 (ATC 73) were built (N8063, NC10003, NC10080, NC11985) powered by a 120hp Walter, redesignated C3-120 in 1929

The 1929 thee-seat C3-3 (ATC 2-77) was powered by a 170hp Curtiss Challenger engine.

The 1929 C3-4 (ATC 2-78) was powered by a 115hp Axelson A engine.

The 1929 C3-5 (ATC 2-79), later re-designated C3-165, was powered by a 165hp Wright J-5 engine.

Over forty of the 1929 C3-165 (ATC 195) were built, priced at $6,750 and increasing to $5,975 in 1930.

Only one C3-166 (ATC 290) was built, NC707N. Built in 1929 it was similar to the C3-165, powered by a 165hp Comet 7-E engine, and priced at $5,675.

Fourteen of the 1930 C3-225 (ATC 286) were built, powered by a 225hp Wright J-6 engine, and priced at $7,750.

C3-1
Engine: 125hp Ryan-Siemens
Wingspan: 32’0″
Length: 23’6″
Useful load: 800 lb
Max speed: 115 mph
Cruise: 98 mph
Stall: 42 mph
Range: 450-500 mi
Ceiling: 11,000 ft

C3-2 / C3-120
Engine: 120hp Walter

C3-3
Engine: 170hp Curtiss Challenger
Seats: 3

C3-4
Engine: 115hp Axelson A

C3-5 / C3-165
Engine: 165hp Wright J-5

C3-165
Engine: 165hp Wright J-6
Length: 23’2″
Useful load: 905 lb
Max speed: 115 mph
Cruise: 100 mph
Stall: 45 mph
Range: 500+ mi

C3-166
Engine: 165hp Comet 7-E

C3-225
Engine: 225hp Wright J-6;
Length: 23’3″
Useful load: 959 lb
Max speed: 130 mph
Cruise: 110 mph
Stall: 55 mph
Range: 460 mi