Wow! The voting is all over, but still the BS scaremongering continues.
Firstly, nothing is going to change for some considerable time, between 2 and 5 years.
Secondly, plenty of other EU nations are likely to have similar referendums, so we won't be alone in our region, and in all probability this is a fatal blow for the EU and it'll break apart completely over then next 5-10 years.
Thirdly, not being in the EU doesn't prevent trade. The UK aren't pulling up drawbridges and the Europeans aren't likely to either. The EU might be indignant enough to try, but I suspect negotiations would not be with the EU but the individual Sovreign governments because of the paragraph above.
British aviation managed just fine before the EU, arguably a lot better in market share (especially manufacturing). All the doom mongering is some dark fantasy by malevolent mentalities.