The initial phase of the JUNO V space vehicle development program, as presented herein, provides for a static demonstration and a total of four flight feasibility tests. The latter two flights will give the U.S. its first payload capability in excess of 10,000 lb in mid 1961. The objective of the overall program is to provide a reliable, economical, and flexible carrier vehicle with relatively large payload capability for orbital and space missions at the earliest possible date.