Matches in DBpedia 2015-10 for { ?s ?p "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."@en }
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- Curtiss_XO-30 abstract "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.".
- Curtiss_XO-30 comment "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.".