Originally Posted by
fox niner
are the current modern requirements more stringent than they used to be for Convair/DC3 generation airplanes?
The Convair 240/340/440/C-131 is not the same generation as the DC-3. The DC-3 was a pre-WWII design and the Convair was a post WWII design. There was significant amount of advancement in the intervening years.