1964年7月，将土星测试硬件交付给马歇尔航天飞行中心

1964年7月，第一颗土星五号S-IVB，或第三阶段测试硬件，从加州长滩交付给美国宇航局马歇尔航天飞行中心。S-IVB由道格拉斯飞机公司研发和制造，直径约21又1/2英尺，长度约58英尺，由一个J-2发动机提供动力，能够产生22.5万磅的推力。在道格拉斯的垂直检出大楼里，道格拉斯飞机公司为SA-503火箭系统（阿波罗8号任务）装配了完整的S-IVB。

在全世界庆祝阿波罗计划50周年之际，美国宇航局将重返月球，在那里建立一个永久基地，并为包括火星在内的深空载人探索开发项目。

In July 1964, the first Saturn V S-IVB, or third stage test hardware, was delivered to NASA’s Marshall Space Flight Center from Long Beach, California. Developed and manufactured by Douglas Aircraft Co., the S-IVB measured about 21 1/2 feet in diameter, was about 58 feet in length and was powered by one J-2 engine capable of producing 225,000 pounds of thrust. Here, the fully assembled S-IVB for the SA-503 rocket, the Apollo 8 mission, is in Douglas’ vertical checkout building.

As the world celebrates the 50th anniversary of the Apollo Program, NASA is going back to the Moon to build a permanent base there and develop programs for the crewed exploration of deep space, including Mars.

Image Credit: NASA