Waco 10 / O series

The Waco 10, the three-seat open-cockpit biplane that was the best-selling American sport and training aeroplane of the late 1920s: at least 1,623 built by the Advance Aircraft Company (renamed Waco) from 1927 to 1933, with two passengers side by side under the upper wing ahead of the pilot and a fabric-covered steel-tube fuselage. The original 90 hp war-surplus Curtiss OX-5 model became the GXE when Waco changed its designation system in 1928 (ATC A-13, October 1927); the later three-letter names encode the engine, the wing (S straight, T tapered) and O for the Model 10 fuselage, so the ASO is the straight-wing Waco 10 with a 220 hp Wright J-5 Whirlwind (ATC A-41, June 1928). The F series of 1930 supplanted it.

The variants

MODEL	YEARS	ACTIVE	TAILFAX SCORE	WHAT CHANGED
GXE	1927–1930	33	Partial 5/30	The original Waco 10: 90 hp Curtiss OX-5; renamed GXE in 1928
ASO	1928–1929	33	—	Straight-wing Waco 10 with the 220 hp Wright J-5 Whirlwind; ATC A-41, June 1928

Family fleet, active

FAA registry

NTSB events / 1,000, 10 yrs

30.3

2 events over 66 active aircraft, pooled across the family

Successor

Waco F series (RNF)

Data as of: FAA registry Sep 28 · NTSB Oct 2 · scores Sep 30