Manufacturer: Douglas Model: unknown Name: Skytrader Type: Transport Date: 1947 Status: Experimental Country: United States of America Service: U.S. Navy Designation: XR7D-1 |
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Synopsis:
The U.S. Navy received three Douglas Skytrader prototypes, which received the XR7D-1 designation. Named after Christopher Columbus's pioneering boats, each presented a different configuration: the XR7D-1"Nina" was an all-freight version, the XR7D-1V "Pinta" was strictly a VIP transport, while the XR7D-1U "Santa Maria" was a freight/troop transport combination. Elaboration: This aircraft was created by using the Douglas XA2D-1 Skyshark prototype fighter (see below right) and stretching some of its parts to turn it into a mid-size transport and utility aircraft. Of course, it probably ought to have got rid of the plagued Allison T40 turbine for it to work... Viewers' comments:
My comments: Designing aircraft with contra-rotating propellers may have been the rage after the war, yet the technology was far from proven, mostly because no engine was found reliable enough at the time. This caused the demise of the concept, with the speedy development of the turbojet accelerating it even more. From a practical standpoint, a transport aircraft with the engines in the fuselage makes little sense because this reduces considerably the space devoted to the freight or passengers. Most transport have their engines on the wings to optimize the arrangement of the fuselage. So the Skytrader looks good alright, but it probably would have been doomed as a real-life project... |