#rl-10

"The Saturn I S-IV stage (second stage) for the SA-7 mission being prepared for shipment to Cape Canaveral, Florida. The S-IV stage had six RL-10 engines, which used liquid hydrogen and liquid oxygen as its propellants, arranged in a circle. Each RL-10 engine produced a thrust of 15,000 pounds for a total combined thrust of 90,000 pounds. The SA-7 mission was launched on September 18, 1964 from Cape Canaveral, Florida, and its S-IV stage made the second orbital flight."

Date: January 8, 1964

Pratt & Whitney RL-10 Rocket Engine

A Centaur upper stage in the factory, sometime in the 1960s. This one would've been used as an upper stage on an Atlas rocket, unless it was sitting in storage for several years. For all I know, this could've been the upper stage on some really interesting mission.

2010 July 17 - Hakui by fum-my on Flickr.