Archive for September 2019

Space Rocket History #147 – Saturn: S-II Stage Part 2: Trials and Tribulations

September 6, 2019 @ 11:15 am

“The S-II stage was a nightmare the minute it was conceived, and it only got worse from there. During the course of its creation, it would grind up people and careers the way the transcontinental railway devoured laborers.  Though the methods and materials used to build the S-II were reasonably well known, nobody had ever tried to apply them on such a titanic scale.  Originally, it was to be somewhere around 8 stores tall with a diameter of 22 feet, but the width ballooned from there to 27 feet before the contract was  even signed, then to 30, and finally to 33 feet.  And all the while as the size of thing increased, NASA was trimming the allowable weight.”  Harrison Storms of NAA.

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Space Rocket History #146 – Saturn: S-II Stage Part 1: Common Bulkheads, Gores, & Honeycomb Sandwiches

September 6, 2019 @ 11:06 am

The structural efficiency of the S-II stage, in terms of the weight and pressures taken by its extra-thin walls, was comparable only to the capacity of one of nature’s most refined examples of structural efficiency, the egg.

 

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Space Rocket History #145 – Surveyors 2 – 7 with a Little Apollo 12

September 6, 2019 @ 10:47 am

The primary objectives of the Surveyor program, were to support the Apollo landings by: (1) developing and validating the technology for landing softly on the Moon; (2) providing data on the compatibility of the Apollo design with conditions encountered on the lunar surface; and (3) adding to the scientific knowledge of the Moon.

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