If any of you have actually tried to search for engineering or scientific data on the internet it is daunting. Either some organization wants $15 for a pdf copy (that might not be what you are looing for) or you have to join some organization and pay annual dues.
This might not help you for engineering, but PubMed seems to be including more and more basic science subjects, not just medicine and biology. If you can enter the last name and one or two initials, in that order, of the author, you might be surprised at what you find. That's one of the easiest ways to search there, but if you only have a subject such as astrophysics, you get 660 hits, with many ways to limit the search.