I'm not totally sure what you're asking: the title of your question doesn't really match what you said below it (at least, it looks that way to me). Unless you're suggesting that Aviation.SE can only become authoritative if it has a wiki series on basic flight concepts?
But anyway, there are several issues with what (I think) you're proposing:
- If we explicitly create a series of wiki answers on flight basics (whatever that actually means), where do we stop? Why not have one on flight training, ATC, aerodynamics, etc.? Going down the road of selected, prepared information is counter to the fundamental concept of SE.
- Who decides what questions should be included? Deliberately creating a series of Q&A to address a perceived need for information instead of an actual one has no decisive benefit. If we respond to genuine questions then at least we know we're providing information that someone really wants.
- If we have good, clear questions and answers then Google or other search engines will find them easily anyway, with no need to structure them in a specific format.
- It isn't clear that we need wiki answers to refer to from other questions. SE is pretty good at finding related questions already, and regular contributors probably already know the 'definitive' answers to direct people to.
Having said all that, if you think there's a lack of basic questions on fundamental points, then the most obvious thing you can do is simply ask them!