The Elfin Type 100 Mono is an Australian 1½ Litre Formula racing car produced from 1964-1969 by

Elfin Sports Cars Elfin Sports Cars Pty Ltd (formerly known as Elfin Sports Cars) is an Australian car manufacturer company that was founded by Garrie Cooper. It has been an Australian manufacturer of sports cars and motor racing cars since 1959. Elfin Sports C ...

. The name "Mono" refers to the fact that it was constructed upon a

monocoque Monocoque ( ), also called structural skin, is a structural system in which loads are supported by an object's external skin, in a manner similar to an egg shell. The word ''monocoque'' is a French term for "single shell". First used for boats, ...

design.

Development

In 1963,

Garrie Cooper Garrie Clifford Cooper (22 December 1935 - 25 April 1982) was the founder of the highly successful Elfin Sports Cars and a competitive racing driver in his own right, winning the 1968 Singapore Grand Prix, the 1968 Australian 1½ Litre Champi ...

began work on a revolutionary

design of a car intended to dominate the newly created Australian 1½ Litre capacity class. Lotus Cars had already built the Formula 1 monocoque under the direction of

Colin Chapman Anthony Colin Bruce Chapman (19 May 1928 – 16 December 1982) was an English design engineer, inventor, and builder in the automotive industry, and founder of Lotus Cars. In 1952 he founded the sports car company Lotus Cars. Chapman ...

but the idea was still in its infancy so

Cooper Cooper, Cooper's, Coopers and similar may refer to: * Cooper (profession), a maker of wooden casks and other staved vessels Arts and entertainment * Cooper (producers), alias of Dutch producers Klubbheads * Cooper (video game character), in ...

had only vague ideas of the design. The

build removed the need for the traditional "Superleggera" tube frame chassis and harnessed a very light sheet steel frame to which aluminum panels were riveted for a very stiff structure. The finished structure weighed approximately 80 kg less than the tube framed

Elfin Catalina Elfin Sports Cars Pty Ltd (formerly known as Elfin Sports Cars) is an Australian car manufacturer company that was founded by Garrie Cooper. It has been an Australian manufacturer of sports cars and motor racing cars since 1959. Elfin Sports Ca ...

it replaced. Uniquely, the hollow section of the body was sealed off to serve as the petrol tank. The Elfin Mono eventually made its debut at the August 1964 Melbourne Racing Car show and orders quickly followed.http://melbourneclassics.com/files/THREE_AUSTRALIAN_GPs.pdf

References

{{Elfin Type 100 Mono Tasman Series cars Cars of Australia