Lotus 69
open-wheel formula racing car
The Lotus 69 was an open-wheel formula racing car developed by Lotus in 1969 for use in Formula 2, Formula 3, and Formula Ford.
Development
Since the Formula 2 regulations for 1970 provided for extensive changes to the vehicles, Dave Baldwin developed the Lotus 69 based on the Lotus 59 Formula 2 car.
He left the basic Lotus 59 construction untouched and only changed the central monocoque section, which contained the two fuel tanks. The chassis mounts have been modified and the front has been adapted to the new regulations to reduce the radiator inlet. Since only engines up to a maximum of 1600 cc were allowed in Formula 2 from 1967 to 1971, the car received a 1.6-liter Cosworth FVA four-cylinder engine and a Hewland F.T.200 gearbox.
The basic vehicle construction was designed in such a way that by adding other suspensions and brakes, and by changing the body parts and the wheels, the Lotus 69 could be built into a Formula 3 or Formula B- compliant racing car.
With the increase in the displacement limit to 2000 cc in Formula 2, the racing cars were equipped with a Cosworth BDA engine in 1971.
The Lotus 69F was built to Formula Ford regulations and featured a space frame chassis with a modified front end and narrower wheels than the Formula 2 and Formula 3 variants. It was delivered with 1.6-liter Ford/Lotus engines.
A total of 57 racing cars were produced by the Lotus 69, of which eight cars were built for Formula 2.
The public source identifies “Lotus 69” as open-wheel formula racing car. This brief keeps that definition visible, then builds a research path around Lotus, open-wheel and formula.
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This entry incorporates text from “Lotus 69” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.