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Model 14 Super Electra
Medium Amphibious Transport Aircraft
Lockheed
 The Lockheed Model 14 Super Electra, better known as the Lockheed 14, was a civilian passenger and cargo aircraft built by the Lockheed Aircraft Corporation in the late 1930s. Developed under the direction of Don Palmer, it was a constructive development of the earlier 10 and 12 Electra, with a larger fuselage and increased passenger capacity up to 12-14 people.
The aircraft was intended to compete commercially with the Douglas DC-2 and Boeing 247. The first Model 14, piloted by Marshall Headl, took off on July 29, 1937. Initially, the 14th model was powered by Pratt & Whitney R-1690 Hornet engines, later the Wright R-1820 Cyclone 9 was offered as an option.
Lockheed built a total of 114 14 models, with another 119 being built under license in Japan by the Tachikawa Aircraft Company under the designation Tachikawa Type LO Transport Aircraft Thelma. Another 121 aircraft were built by the aircraft manufacturer Kawasaki under the designation Kawasaki Type 1 Cargo Carrier. The cargo type 1 fuselage was lengthened by 1.4 m, which made it possible to install large cargo doors on it.
In Japan in the late 1930s and early 1940s, as in most major economic powers of that time, research was carried out to create pressurized fuselages with high-altitude systems (SARD and SCR) for high-altitude flights. Similar to the Lockheed XC-35 in the United States, Tachikawa created a pressurized cockpit, thanks to newly created front and center fuselage sections in one of Lockheed Type LO transport aircraft already built. The resulting research aircraft had the long designation of the Tachikawa-Lockheed Type-B high-altitude research aircraft and the company designation Tachikawa SS-1. The aircraft was completed in May 1943 and was powered by two Mitsubishi Ha-102 14-cylinder radial engines with a capacity of 810 kW (1080 hp). A short flight test program was carried out on the plane.
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Aircraft
