I'm with Fris. The/ A National Aviation Collection could only built up by robbing out smaller museums all over Oz for the icons.. Shouldnt happen.
All those regional museums benefit the community... and they continue to pop up... eg Nhill
Here in the deep north, just pressed the starter button see...
FNQ Aviation Museum ? Preserve | Inspire | Educate | Restore Where there a will there's a way.!
And there's some very interestng WW2 wreckology and histories here to be told as well as pioneering aerial agriculture, heli-mustering, McDonald Airways, Bushies/BPA and much else.
Building better regions is the go..Cantberra already has loads of venues.