The Keystone XB-1B was the designation assigned to the Huff-Daland XB-1 after the original Packard 2A-1530 engines were replaced with Curtiss V-1570-5 Conqueror engines (Huff-Daland was reorganized and renamed Keystone in 1927 -- between the time the XB-1 was built and the XB-1B was modified). The XB-1A designation was skipped because it was already assigned to the Dayton-Wright XB-1A "Bristol Fighter." The improved -B aircraft had better performance than the original, but still didn't compare favorably to other aircraft of the period and never entered production. The performance of the Curtiss XB-2; for example, was significantly better than the XB-1B, but the Curtiss aircraft was initially rejected also; in part because it was too big to fit into existing hangars. Newspaper article below: PHILADELPHIA, THURSDAY MORNING, AUGUST 25, 1927 -------------------------------------------------------------------------------- FIVE-TON ARMY BOMBER MAKES "DEBUT" IN AIR -------------------------------------------------------------------------------- Super Cyclops Soars on Two Test Flights at Bristol -------------------------------------------------------------------------------- BIG SHIP TAXIS ONLY 100 YARDS AND RISES -------------------------------------------------------------------------------- Skims Barn Roof on First Flight and Settles in Perfect Landing -------------------------------------------------------------------------------- CAN CARRY 6 MACHINE GUNS, 2700 POUNDS OF ...
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