Yes, B727-200, the "Stretch." Like the notorious DC-10/MD-11 for the L-1011, the DC9/M80 was a cheap, rushed-together imitation of the real thing:
The POS DC9 reminded me of sitting in the back of an old Constellation it was that flexy. Yes, I'm that old. I just tried to make I didn't fly late afternoon in the great Plains states anymore than I had to. Avoid the blow up Thunderstorms and worse as much as I could. .
Now, now.... The DC-9/MD81-2-3-7-8/MD90/MD95 (717) is a wonderful airplane!
Let me explain WHY the DC-9 is in many ways superior to the 727-100/200:
1) The flight deck only requires 2 pilots, the 727 required 2 pilots and an engineer. Much more expensive to operate because of that.
2) The DC-9 has just 2 engines, the 727 has 3. Again, much more expensive to operate because of that.
3) The 727 has an engine "buried" in the rear of the fuselage. Much more difficult to service, which means much more expensive to operate.
4) Seating on the Dc-9 was 2x3. Passengers like having the "2" seats as you are only 1 seat away from the aisle.
5) The DC-9 was able to be stretched from the original "10" series all the way up to the very economical MD90 series. A remarkable program, just like the 737 program.