Douglas DC-4 Trans World TWADouglas DC 4 TWA airplane model. The Douglas DC 4, an American four engine propeller driven airliner, was developed by the Douglas Aircraft Company. Its military variants, the C 54 and R5D, were active during World War II, participated in the Berlin Airlift, and continued service into the 1960s. Post 1945, the DC 4 was widely used by civil airlines across the globe. Mahogany Wood. Scale: 1 72. Wingspan: 19 1 2 inches. Length: 15 1 2 inches.