Encyclopedia Astronautica
1967.06.17 - Plans made to armor-plate 102 out of 167 solder joints inside the Apollo CM of spacecraft 101

Plans were to armor-plate 102 out of 167 solder joints inside the CM of spacecraft 101, ASPO Manager George M. Low informed Maxime A. Faget, MSC's Director of Engineering and Development.

Of the remaining 65 joints, 53 would be accessible for armor-plating and x-raying, while the other 12 would not. Low said: "As joints become less accessible, the excess solder removal process, the joint-cleaning process, and the application of the armor-plating become more difficult. Also, in many places, the standard armor-plating sleeve does not fit, and a shorter or cutaway sleeve is required. I have therefore reached the conclusion that, at some point, the armor-plating process may become detrimental. . . . You should know that Mr. (Joseph N.) Kotanchik disagrees with this position. Joe believes that any joint in the spacecraft could be under stress and therefore is subject to creep. The only solution . . . according to Joe, is to armor-plate all joints. . . ." Low added that joints that are accessible from outside the CSM would also be armor-plated and that future spacecraft would include additional armorplating. He said, "My expectation is that all solder joints will be armor-plated in the lunar configuration. . . ."

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