|astronautix.com||Engineering and cost study for a new Saturn configuration|
The Advanced Research Projects Agency ARPA and NASA requested the Army Ordnance Missile Command AOMC to prepare an engineering and cost study for a new Saturn configuration with a second stage of four 20,000-pound-thrust liquid-hydrogen and liquid-oxygen engines (later called the S-IV stage) and a modified Centaur third stage using two of these engines later designated the S-V stage).
AOMC was also asked to indicate what significant program improvements or acceleration could be achieved with an increase in Fiscal Year 1960 funding if provided late in the fiscal year. The study was sent to ARPA and NASA by AOMC on December 10 and formally submitted on December 28. References: 16 .