American test vehicle. Test vehicle developed by Sandia for aeronomy measurements during atmospheric nuclear tests. One (Doorknob-1) or two surplus Lacrosse (Doorknob-2) missile motors were mated with the payload section.
Status: Retired 1959. First Launch: 1957-01-01. Last Launch: 1959-01-31. Number: 21 . Gross mass: 500 kg (1,100 lb). Height: 3.60 m (11.80 ft). Diameter: 0.40 m (1.31 ft). Apogee: 24 km (14 mi).