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Car tailfin

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Through World War II

General Motors design chief Harley Earl is often credited for the automobile tailfin, introducing small fins on the 1948 Cadillac, but according to many sources the actual inventor/designer of the tailfin for the 1948 Cadillac was Franklin Quick Hershey, who at the time the 1948 Cadillac was being designed was chief of the GM Special Car Design Studio. It was Hershey who, after seeing an early production model of a P-38 at Selfridge Air Base, thought the twin rudders of the airplane would make a sleek design addition to the rear of future modern automobiles. Tailfins took particular hold on the automotive buying public's imagination as a result of Chrysler designer Virgil Exner’s Forward Look, which subsequently resulted in manufacturers scrambling to install larger and larger tailfins onto new models. As jet-powered aircraft, rockets, and space flight gained public recognition through the Space Race, the automotive tailfin assemblies (including tail lights) were designed to resemble more and more the tailfin and engine sections of contemporary jet fighters and space rockets.

Plymouth claimed that the tailfins were not fins, but "stabilizers" to place the "center of pressure" as far to the rear as possible and thus "reduce by 20% the needs for steering correction in a cross wind", while Mercedes-Benz called its own tailfins Peilstege, sight lines that ostensibly aided in backing up.

Background

Automobile engineer Paul Jaray added a center fin to his prototype designs in the 1920s for aerodynamic stability. Influenced by his patents some car producers made streamlined prototypes with one center positioned tailfin. For example, the Audi F5 Stromliner prototype, Kdf-Wagen prototype, Tatra T77 production car or Fiat Padovan prototype.

Some sub-models of the 1937 Cadillac Fleetwood, which predates the P-38, also contained hints of tailfins via projecting tail-light "paddles", although it is unclear if this influenced later fin designs. The 1941 Cadillac Series 63 4-Door Sedan also had a form of jutting tail-lights, although milder than the 1937 Fleetwood. Even though the 1948 model was the first conscious effort at fins, the earlier partial occurrences may have made the concept more acceptable to consumers and designers. (World War II produced a gap of Cadillac model production between the early 1940s and late 1940s as factories turned to military goods production, interrupting the development of the fin concept.)

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