(NASA Photograph.) black-and-white photos SB2U-1 Vindicator Model May 24, 2016by Lone_Sentry_Admin1 min read A full-scale model of the Vought SB2U-1 Vindicator is used in drag reduction research in Langley’s 30 x 60 Full Scale Tunnel in September 1937. (NASA Photograph.) (NASA Photograph.)