Please compare the range and particularly the cargo capacity of the 170 family versus the Bombardiers. The double bubble of the 170 gives it more cargo hauiling space and cargo weight carrying ability than DC9-10's which are normally configured for 78 pax, while offering twice the range. CRJ900 suffer severe range and freight penalties at max pax. Embraers clean sheet design is a definite threat. I see them taking over many of the DC9/and shorter MD
-80 family applications since the next jump up from a 170/175/190/195 to 737-700 (or 737-600's--have any been sold??) and A318 is a quantum leap in operating weight class.
The Original Coronado: First CV jet flights RG CV 990 July 1965; DL CV 880 July 1965; Spantax CV990 Feb 1973