This caught me by surprise. Trying to take off fully loaded from an airstrip at 7,000 ft, (Flagstaff AZ) might just be possible but I couldn't manage it no matter how carefully I nursed the speed v rate of climb.
Not sure how accurate this is (I have the Duckworks mod), one notch of flaps and full boost gets you near 55" MP and a lot more power, even then it requires care and you had better get the undercarriage up PDQ.
Did the real DC-3s have boost? And under these conditions is full rich mixture a good idea?
Geoff