page_title: Huff-Daland XB-1
section_title: Operational history
hierarchical_section_title: Huff-Daland XB-1 / Operational history
caption_attribution_description: Keystone XB-1B, early U.S.Army bomber prototype
context_page_description: The Huff-Daland XB-1 was a prototype bomber aircraft built for the United States Army Air Corps.
  The XB-1 was the first aircraft named using just a B- designation. Prior to 1926, the U.S. Army used LB- and HB- prefixes, signifying 'Light Bomber' and 'Heavy Bomber'. The first XB-1, called the Super-Cyclops by Huff-Daland, was an extension of the earlier Huff-Daland XHB-1 'Cyclops'. It was essentially the same in size, but sported a twin tail and twin engines.
context_section_description: The aircraft flew for the first time in September 1927. Its original Packard engines did not provide enough power for the aircraft, and it was refitted with more powerful Curtiss Aircraft "Conqueror" engines. This new configuration was designated the XB-1B.
  Three other similar aircraft designs were requested by the Army Air Corps around the same time which competed against the XB-1 for the contract. Of these three (the XB-2 Condor, the Sikorsky S-37 and the Fokker XLB-2), the Curtiss model eventually won, and only a single XB-1 was ever produced.
caption: Close view of starboard nacelle
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