Model 12 Electra Junior
Lockheed Corporation · Civil and military utility aircraft · United States · Interwar (1919–1938)
The Lockheed Model 12 Electra Junior was an American twin-engine 6-passenger commuter airliner — Lockheed's smaller refinement of the Model 10 Electra + a popular interwar executive transport. Lockheed engineer Hall Hibbard designed the Model 12 in 1935; first flight 27 June 1936. About 130 Model 12s were built between 1936 and 1941 at Lockheed Burbank. The aircraft served airlines + corporate operators + ~15 air forces 1936-1960.
The Model 12-A used 2 × Pratt & Whitney R-985 Wasp Junior 9-cylinder radial engines (450 hp each). Maximum speed 362 km/h, range 1,600 km, service ceiling 7,000 m. Capacity: 6 passengers + 2 crew. The aircraft was designed for short-haul commuter + executive transport — smaller + more-economical than the larger Model 10 Electra. The famous Sidney Cotton fitted a Model 12 with hidden cameras for clandestine 1939 pre-war reconnaissance over Germany + Italy — establishing the long-range-reconnaissance-aircraft concept.
Model 12 service was extensive. Civilian use included Continental Airlines + Delta Airlines + Chicago Southern Air Lines + Asiatic Petroleum + private executive operators. Military use included U.S. Army Air Corps (UC-40) + RAF (Lockheed 12A) + RCAF + Argentine Air Force. About 12 Model 12 airframes survive in 2026 — including 2 airworthy examples at the American Airpower Museum + Yanks Air Museum.
For Kids — a shorter, friendlier version
The Lockheed Model 12 Electra Junior was an American airplane built in the 1930s. It had two engines and could carry six passengers. A Lockheed engineer named Hall Hibbard designed it in 1935. It first flew on June 27, 1936.
The Model 12 was smaller than the earlier Model 10 Electra. It was made for short trips and for business travelers. Airlines like Continental and Delta used it. About 15 air forces around the world flew it too.
Each engine was a Pratt and Whitney Wasp Junior with nine cylinders. The plane could fly faster than 360 kilometers per hour. It could travel up to 1,600 kilometers on one trip. That is longer than many road trips by car!
A man named Sidney Cotton did something very clever with a Model 12 in 1939. He hid cameras inside the plane. Then he flew over Germany and Italy to take secret photos. This helped show how spy planes could work in the future.
About 130 Model 12s were built between 1936 and 1941. They kept flying all the way until 1960. Both businesses and military groups used them for many years.
Fun Facts
- The Model 12 could carry six passengers — about the size of a small family car full of people!
- It was powered by two nine-cylinder radial engines, one on each wing.
- The plane first took off on June 27, 1936, nearly 90 years ago.
- Sidney Cotton hid secret cameras inside a Model 12 to take spy photos over Germany in 1939.
- The Model 12 was smaller than its big brother, the Model 10 Electra, making it cheaper to run.
- Around 130 of these planes were built at the Lockheed factory in Burbank, California.
- The Model 12 flew faster than 360 kilometers per hour — faster than most cars on a highway!
- It served airlines, businesses, and air forces for over 20 years.
Kids’ Questions
Who designed the Lockheed Model 12?
A Lockheed engineer named Hall Hibbard designed the Model 12 in 1935. It first flew the next year in June 1936. He wanted to make a smaller and cheaper version of the Model 10 Electra.
What did Sidney Cotton do with a Model 12?
Sidney Cotton fitted a Model 12 with hidden cameras in 1939. He flew over Germany and Italy to take secret photos before World War Two began. His idea helped shape how spy planes were used later on.
How many people could fly in a Model 12?
The Model 12 could carry six passengers and two crew members. That means eight people could fit on board in total. It was made for short trips and business travel.
How many Model 12s were ever built?
About 130 Model 12 planes were built between 1936 and 1941. They were all made at the Lockheed factory in Burbank, California. Airlines, businesses, and air forces all used them.
Variants
- Model 12-A (basic)
- Standard production. About 120 built.
- Lockheed 12-A (RAF reconnaissance)
- Sidney Cotton's modified clandestine-reconnaissance variant. ~12 modified.
Notable Operators
- Worldwide commercial + executive (1936-1960)
- Continental + Delta + Asiatic Petroleum + others.
- Military operators
- U.S. Army Air Corps + RAF + RCAF + Argentine Air Force + ~15 others.
Frequently Asked Questions
Who was Sidney Cotton?
Australian-born British pilot + spymaster who pioneered clandestine pre-war aerial reconnaissance. In 1939 Cotton flew civilian-registered Lockheed Model 12s with hidden cameras over Germany + Italy under cover of business flights — photographing pre-war military preparations. Cotton's RAF Photographic Development Unit subsequently established the British long-range-photo-reconnaissance doctrine that proved essential to WWII Allied intelligence. The Model 12 was Cotton's aircraft of choice because its civilian appearance + reasonable range + speed allowed clandestine missions that purpose-designed military reconnaissance aircraft could not have flown.
Sources
See Also
- Lockheed Model 10 Electra — Direct larger predecessor
- Lockheed Vega — Earlier Lockheed record-setter