How about a 727? Three engines, two mounted on the outside of the fuse on pylons aft of the main cabin while the third was fared into the tail cone. It's predecessor was the four engined 707/C135.
Another option would be the DC-9/MD-80/C-9. Again, it's predecessor was the four engined DC-8
Last edited by Hydro Junkie; 07-12-2018 at 04:45 PM.