Quote:
Originally Posted by AdamJL
My question is, with the delays that have happened, have they used the opportunity to upgrade any of the components? Make them more resilient, or faster, or more sensitive?
Is that where the cost overrun went to? 
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Strangely enough easier said than done, the componants are state of the art, one of a kind, cant just get another upgraded version 'off the shelf'' would need a year or more to redesign, build, check and recheck, then fit into a space which was not designed to fit the newer version, list goes on, and, if was at all possible, then two years of age added to the all other componants and then they would need upgrading, one hell of viciuos circle, the thing would never get of the ground
I believe most of the extra time and expence was due to testing which came up with some issues regarding reliablity of movement in the mirror cells that fold out and the heat shield sails which were sticking as they expanded etc, then countless more rechecking because as Marc said, "once Jame Web is in situ, then can not be accessed for repairs, hence, rechecking everything time and time again...
Kind Regards ..