Operational History
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.
Read more about this topic: Huff-Daland XB-1
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