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VOUGHT SB2U VINDICATOR
Design & Development

In 1934, the U.S. Navy issued a requirement for a new Scout Bomber for carrier use, and received proposals from six manufacturers. The specification was issued in two parts, one for a monoplane, and one for a biplane. Vought submitted designs in both categories, which would become the XSB2U-1 and XSB3U-1 respectively. The biplane was considered alongside the monoplane design as a "hedge" against the U.S. Navy's reluctance to pursue the modern configuration.

The XSB2U-1 was of conventional low-wing tailwheel monoplane configuration, with the pilot and tail gunner seated in tandem under a long greenhouse-style canopy. Its only remarkable design feature was a propeller with reversible pitch, allowing it to be used to brake the aircraft during a dive bombing attack.

VOUGHT SB2U VINDICATOR WRG# 0000228
SB2U Vindicators of VS-41 in flight over the Atlantic on September 7, 1942
(Source: U.S. Navy)

The SB2U was evaluated against the Brewster XSBA-1, Curtiss XSBC-3, Great Lakes XB2G-1, Grumman XSBF-1 and Northrop XBT-1. All but the Great Lakes and Grumman submissions were ordered into production. Designated XSBA-1, one prototype was ordered on 15 October 1934 and was delivered on 15 April 1936. Used for operational evaluation, its successful completion of trials led to further orders.

VOUGHT SB2U VINDICATOR WRG# 0022112
XSB2U-3 Vindicator on floats, April 5, 1939
(Source: U.S. Navy)

Sources:
Wikipedia
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