Thomas-Morse XO-932 / Y1O-33 / Y1O-41
Consolidated 23
![]() Thomas-Morse XO-932 Y1O-41 (30-90 c/n 1)
The first O-19B was converted to the sole Y1O-33 on May 4, 1931, fitted with revised tail surfaces and a 600 hp Curtiss V-1570-11 Conqueror twelve-cylinder Prestone-cooled V-engine replacing the original 450 hp Pratt & Whitney R-1340-7 Wasp nine-cylinder air-cooled radial.
![]() Y1O-33
The last prototype designed by B.D. Thomas with the Thomas-Morse name was a sesquiplane (small lower wing) known as the XO-932 when first flown on May 4, 1931. A geared, Prestone-cooled Conqueror in a neat cowl, N struts, and wheel pants were featured.
Later this aircraft was fitted with new sesqui-wings, while the Conqueror was geared, and the aircraft, tentatively designated Y1O-41, was tested at Wright Field, Ohio, in June 1931 on a Bailment Contract as the XO-932.
![]() That model was rejected by an Army board because the basic structure seemed weak and the board now believed that “a monoplane is the most desirable type for observation purposes because of its superior qualities of vision.” While not sold to the Army, the aircraft received the YlO-41 designation 30-90.
Thomas-Morse had become a division of Consolidated in 1929 and was discontinued in 1934, the year the XO-932 was stripped of its military equipment and rebuilt as the Consolidated 23 on September 21, 1934. Registered NR33Y the aircraft was used as a company transport till it was sold to Colonel Alfredo Lezama Alvarez of Mexico in December 1936, where it was registered as XA-DBX.
The last aircraft produced by Thomas-Morse the fate of the XO-932 sesquiplane of 1932is unknown.
Y1O-33
Engine: Curtiss V1570-11, 600 hp
Wingspan: 39 ft 9 in
Wing area: 348 sq,ft
Length: 29 ft 2 in
Height: 10 ft 2 in
Empty weight: 3130 lb
Gross weight: 4291 lb
Fuel capacity: 77.5 USG
Top speed: 165 mph at SL / 158 mph at 10,000 ft
Cruise speed: 143 mph
Landing speed: 58 mph
Service ceiling: 22,600 ft
Absolute ceiling: 24,000 ft
Rate of climb: 1840 fpm
Climb to 10,000ft: 6 min
Range: 443 mi
XO-932
Engine: Curtiss V1570-29, 600 hp
Wingspan: 40 ft 8 in
Wing area: 299 sq,ft
Length: 29 ft 3 in
Height: 10 ft
Empty weight: 3254 lb
Gross weight: 4394 lb
Fuel capacity: 79 USG
Top speed: 188 mph at SL / 181 mph at 10,000 ft
Service ceiling: 24,250 ft
Absolute ceiling: 25,500 ft
Rate of climb: 1840 fpm
Climb to 10,000ft: 6.9 min
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