SEV (Scout Evaluation Vehicle) was a NASA launch vehicle evaluation payload to test a new version of the Scout launch vehicle and performing new maneuvers during launch. August 10, 1965 at 17:54 UTC · Launch Successful Scout B — National Aeronautics and Space Administration, to Low Earth Orbit Launch Area 3A, Wallops Flight Facility, Virginia, USA The world's 464th orbital launch attempt, and 71st of 1965. Data: Launch Library 2, The Space Devs. Image by NASA (NASA Image and Media Guidelines) via The Space Devs.