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| | Lockheed PBO Hudson, Lockheed R4O Super Electra, by Jack McKillop |
 | | The Lockheed Model 14 Super Electra, built by the Lockheed Aircraft Corporation of Burbank, California, was a contemporary of the Douglas DC-2, designated R2D, q.v., in U.S. Navy (USN) service, but was a more advanced design with more powerful engines giving it a higher cruising speed. |
 | | Lockheed had determined that an aircraft larger than the Model 10 Electra, designated R2O and R3O, q.v., in USN and U.S. Coast Guard service, was required to compete against the DC-2 and DC-3. |
 | | The Model 14 was Lockheed's largest aircraft at the time and in an attempt to produce another plane, Lockheed began work on the Model 18 Lodestar which was designated R5O, q.v., in USN service. |
| www.microworks.net /pacific/aviation/PBO_Hudson.htm (1571 words) |
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