Lockheed L-10 Electra
The Lockheed L-10 Electra was Lockheed's first experiment in metal aircraft production, and was built to compete with the Ford Trimotor. It made its first flight in 1934. Amelia Earhart piloted an Electra on her final around-the-world flight in 1937. While many Electras were impressed into the military during World War II (as the C-36), they started to disappear after the end of the war, by which point they were long obsolete.
Lockheed L-10 Electra variants
| Model | Comments / Military Designations |
| Electra 10-A | Pratt & Whitney R-985-13, 450 hp. each.
3 built as Y1C-36 / C-36 / UC-36
15 impressed as UC-36A
3 built as XR20-1 / R20-1 for Secrerary of the Navy
1 built as Y1C-37 / C-37 / UC-37 for Chief of National Guard Bureau
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| Electra 10-B | Wright R-975-13, 440 hp (340 kW) each.
7 impressed as UC-36C
1 built as XR30-1 for Secretary of Treasury
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| Electra 10-E | Pratt & Whitney R-1340-49 radials of 600 hp (450 kW) each.
The version used by Amelia Earhart.
5 impressed as UC-36B
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XC-35 | Pressurized Research Model Supercharged Pratt & Whitney XR-1340-43, 550 hp (410 kW) each.
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