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The Curtiss XO-30 was a projected 1920s American twin-engined observation monoplane designed by the Curtiss Aeroplane and Motor Company for the United States Army Air Service, a prototype was cancelled and not built.
Design and development
One prototype observation monoplane was ordered by the United States Army Air Service and designated XO-30 with the serial number 29-451. The XO-30 was to have had two Script error: No such module "convert". V-1570-9 engines and a crew of three. The program was cancelled and the prototype was not built.
- Andrade 1979, p. 138