The early DC 3 had a "wobble Pump" that was pumped for fuel pressure during startup to get the engines running.
Once the engine was running the engine pumps kept it going.
The original DC 3 operated by Autair in 1960 ( G-AJIC) had such a system,
During the summer the aircraft flew on Charter at Southend ( After Skyways were an aircraft short when one of theirs overran the runway and tried to catch the train
)
During that winter it was decided to use the aircraft on photo survey for Huntings in West Africa.
The aircraft went to Fields in Wymeswold to have electric fuel pumps fitted and equipped with camera gear in the belly.
The project required flight at 20,000 feet above ground which gave us something like 22-23,000 feet.The engines were of course running on the electric pumps.
One day at altitide one of the pumps stopped - so did the engine
there were some intereting cloud pictures taken by the camera in the belly
