The Lockheed Model 34 Big Dipper was an American two-seat monoplane, designed and built by Lockheed at Burbank for research into the company's potential entry into the civil lightplane and military light utility aircraft market. Only one was built, and following its loss in an accident the program was abandoned.

Design and development

Developed by

John Thorp John Willard Thorp (June 20, 1912 – April 18, 1992) was an American aeronautical engineer who made significant contributions to aircraft design throughout his life. Born in French Camp, California, John Thorp grew up from age four in the ...

and based on his work on Lockheed's

Little Dipper Little is a synonym for small size and may refer to: Arts and entertainment * ''Little'' (album), 1990 debut album of Vic Chesnutt * ''Little'' (film), 2019 American comedy film *The Littles, a series of children's novels by American author John P ...

lightplane project,Francillon 1982, pp. 277 the Lockheed Model 34, named "Big Dipper", was intended as a prototype for a lightplane to sell on the postwar market - Lockheed hoping to sell the aircraft at a price of $1500 - and as a potential 'flying jeep' for the

United States Army The United States Army (USA) is the land warfare, land military branch, service branch of the United States Armed Forces. It is one of the eight Uniformed services of the United States, U.S. uniformed services, and is designated as the Army o ...

. It was a low-wing cantilever monoplane with a fixed

tricycle landing gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...

and a conventional

empennage The empennage ( or ), also known as the tail or tail assembly, is a structure at the rear of an aircraft that provides stability during flight, in a way similar to the feathers on an arrow.Crane, Dale: ''Dictionary of Aeronautical Terms, third e ...

; the cabin was enclosed, seating two in side-by-side positions. Unusually the Continental C100 piston engine was fitted in the center fuselage behind the cabin, driving a two-bladed pusher propeller mounted at the rear of the aircraft.

Operational history

The Model 34 was built at Burbank from July 1945. To keep the project secret the aircraft was moved to Palmdale by road when completed, flight testing being conducted at Muroc Dry Lake. It first flew on 10 December 1945, and after 40 hours of flight testing was returned to Burbank for modifications, intended to correct a wing-root stall issue that had been identified. It was decided not to complete the modification, and the aircraft was to be flown back to Palmdale on 6 February 1946. To try to keep the Big Dipper secret, it was decided to use a shorter upward sloping runway nearer the factory; in the steep climb needed during takeoff from the shorter runway, the aircraft stalled and crashed. With the loss of the prototype, and the fact the expected rush of buyers for new lightplanes was failing to materialize amidst a glut of war-surplus aircraft,Westwick 2012, p. 66. the project, and a proposed high-wing four-seat "Super Dipper" derivative, was abandoned;

Specifications

References

Notes

Bibliography

* * * {{Lockheed Martin aircraft

Big Dipper The Big Dipper ( US, Canada) or the Plough ( UK, Ireland) is a large asterism consisting of seven bright stars of the constellation Ursa Major; six of them are of second magnitude and one, Megrez (δ), of third magnitude. Four define a "bowl" ...