Indexes journals and conference proceedings in the arts and humanities, social sciences, health, sciences and technology disciplines, providing abstracts to the majority, from 1970 to date. This abstract only database is updated weekly. Use Article Linker (AL) to check for full text online sources.
The American national laboratories (for example Sandia National Labs) carry out a variety of research for the US Government which as it's funded by the government is made available to the public. There are lots of reports that are relevant to aerospace engineering.
Standards are the backbone for aerospace engineering - not least because of the amount of collaboration that goes on in the industry.