ETO Airborne Operations Sept 1944 War Dept; WWII Combat Bulletin No. 22

Although I've never exited any aircraft with a parachute nor plan to either i have been up in both a DC3 and a C47. In the case of a DC 3 it belonged to Eastern Airlines and I flew from Boston, MA to Newark, NJ in that commercial aircraft. I have on a number of occasions rode as passenger also in an Air Force C47 first as a cadet in Civil Air Patrol a couple times then later a few more times when i Myself was in the US Air Force.
I did have a cousin that made over 250 parachute jumps and as a pilot also took others up to jump. He was multi engine rated, instructor rated, Instrument rated and later ended up flying for FEDEX and had over 5,000 flying hours. A lot of His flying time before and after was in private aircraft.

There used to be a DC-3 parked at the 82nd ABN museum on Bragg 1972, as well as other old aircraft. That's the only time I ever saw a DC-3, let alone jump out of one, the plane might not have been a DC-3, just an old one. Lol
Notice the air scoop under the engine, just like in your picture of the DC-3.

SGT (Join to see), although variations of the C-47 were still in service when you and I went to jump school, I don't think any airborne operations were conducted with them. I looked at the 173rd's Vietnam combat jump in 1967, and all the aircraft appeared to be C-130s.

LTC Stephen C. - In 72 we made our qualifying jumps with a C-119 and C-134. Once at Bragg we jumped with C-130's and C-141's and UH1.