Originally Posted by
keesje
It would seem Bombardier could use the new CSeries 5 abreast fuselage and many systems as a starting point. They did the same with the Q and CRJ series.
I'm not too sure what you are getting at here, but there's no real design commonality between the dash 8 and CRJ fuselages. The dash started development long before Bombardier/Canadair had any involvement in Downview, and the CRJ fuselage of course is a direct development of the Challenger. So there's no common ancestor to the designs.