Scout X-1A

Scout X-1A was an American sounding rocket flown once, in 1962, a five-stage derivative of the Scout X-1. It replaced the Algol 1B first stage with an uprated Algol 1C and added a fifth stage, the NOTS-17 solid rocket motor developed by the Naval Ordnance Test Station, while its Castor 1A, Antares 1A and Altair 1A upper stages were those of the X-1. Its only flight left Launch Area 3 of the Wallops Flight Facility at 05:07 GMT on 1 March 1962 with an atmospheric re-entry experiment, reached an apogee of 214 kilometres and was successful. The Scout X-2 then replaced it in the Scout line.