<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>ROFLMAO! You guys are talking about shovels, brooms, and "Gooney Birds". None of which operate 24-7! Also, not all the parts are modular, hoses will leak......You're also assuming that all the parts are easily accessible, and replaceable. Maybe, maybe not. <br /> Posted by kyle_baron</DIV></p><p>How much do you actually know about the ISS itself? How much maintainability was and is built in to the station?</p><p>Any large and important project such as this has to have such maintainability at least looked at, and I would be perfectly willing to state that the ISS could very well be usable for at least another 15 years. And that time does not even start until at least 2010, as the station will not even be fully completed until then.</p><p>With the full compliment of six or seven, and with visitors sometimes getting that up to at least twelve for a limited time, the station should have an enormous amount of scientific space studies to be done. And just as importantly (and maybe even more importantly for the long run) it will have a whole lot of studies in how to manufacture and build the infrastructure of the future of humanity in space.</p><p>The vital information achieved from these activities will be worth far more than the mere total cost of the ISS, especially over the long haul.</p><p>Just one for instance: at Rocketdyne we had to use a process called electron beam welding for the very precise welds needed on high performance rocket engines to precisely weld components together. This is a fairly expensive process on the Earth, as there needs to be a very good vacuum in a fairly large volume to make this process even work at all (electron welding beams, and any kind of atmosphere do not work too well together). The energy used for these large vacuum pumps is vast. But in space a very good vacuum can be obtained by just opening up an airlock! So research into such welding ghoul be a relatively an easy thing to be done on the ISS, and will be very essential in the precise assembly of large metal objects in the realms of space.</p><p>Such beams can even be used as a very good machining process in the same manner.</p><p>These processes can be experimented with in small quantities on board a continuing space station in orbit. Yep, just the kind of thing that will eventually bring a very large return for the work on the ISS!</p><p>So all of your negativity is not going to mean anything in the long run of the future of humanity in space, so why even be negative at all? </p><p>I can give fact after fact showing the incredible usefulness of this project if you would wish it, and so can a whole lot of others on this forum!</p><p>There is always some room for legitimate criticism, but as we in the space support community have far too little general support as it is, being overly critical of space projects is somewhat counter productive to what we are trying to get humanity to eventually achieve in space at all! </p><p> </p><p> </p>