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 began work on a revolutionary

design of a car intended to dominate the newly created Australian 1½ Litre capacity class.

Lotus Cars Lotus Group (also known as Lotus Cars) is a British multinational automotive manufacturer of luxury sports cars and electric vehicles. Lotus Group is composed of three primary entities. Lotus Cars, a high-performance sports car company, is ba ...

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 the sports car company Lotus Cars. Chapman founded Lotus in 1952 and initia ...

but the idea was still in its infancy so Cooper 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 C ...

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