Judging from a direct response, it seems that my statement about using minimum solder to save lift-off weight during the lunar lander program generated skepticism...At that time NASA estimated that they saved 450 pounds on the entire Saturn 5 launch vehicle by limiting the amount of solder used for a "one-shot" launch...NASA did not use Mil-Spec, they had their own spec...
Jerry, wa2dkg >>Anything that is built for NASA and will fly will most likely have to be conformal coated...Leaving excess lead length might cause the ends to protrude out of the conformal coating, defeating the purpose of the coating...I was not aware of any min-max lead length protrusion in my dealings with NASA....We used minimum solder to save lift-off weight and we always trimmed flush...<< _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Yes. In the early days of NASA, launch weights were a major
problem. I worked on the Syncom satellites at Hughes in the early 1960s and we even used aluminum coax connectors which could reliably be connected only a few times (what a relief it was was when SMA became available). Our electronics didn't use circuit boards, but the components were soldered together supported by their leads and foamed in place inside small chassis of thin gold-plated aluminum. Bob, N7XY On Oct 26, 2006, at 7:59 AM, Jeremiah McCarthy wrote: > Judging from a direct response, it seems that my statement about > using minimum solder to save lift-off weight during the lunar > lander program generated skepticism...At that time NASA estimated > that they saved 450 pounds on the entire Saturn 5 launch vehicle by > limiting the amount of solder used for a "one-shot" launch...NASA > did not use Mil-Spec, they had their own spec... > > Jerry, wa2dkg > >>> Anything that is built for NASA and will fly will most likely >>> have to be conformal coated...Leaving excess lead length might >>> cause the ends to protrude out of the conformal coating, >>> defeating the purpose of the coating...I was not aware of any min- >>> max lead length protrusion in my dealings with NASA....We used >>> minimum solder to save lift-off weight and we always trimmed >>> flush...<< > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
In reply to this post by Jeremiah McCarthy
In a message dated 10/26/06 9:58:51 AM Eastern Daylight Time,
[hidden email] writes: > At that time NASA estimated that they saved 450 pounds on the entire Saturn > 5 launch vehicle by limiting the amount of solder used for a "one-shot" > launch... I don't know why that would cause skepticism. A fully loaded Saturn V weighed 6,699,000 pounds (according to Wikipedia). 73 de Jim, N2EY _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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