Sinclair C5 Stories

Stories from people involved with the C5's development and stories from enthusiasts now.

Lotus C5 prototype by John Dunne

It's a common misconception that Lotus only involvement in the C5 develop was the Y frame chassis, however as detailed in the Lotus World Magazine March 1985 & also in both of Barrie Will books who was the Managing Director of Sinclair Vehicle, Lotus developed, designed & build the C5 prototypes....

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Offroad Prototypes by Brian McCool

For years there had been rumors about the Off Road C5's. Has anybody seen one? Does anybody know who owns these? How many were made?...

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Recollections by Frank Clements

Colin Chapman, the man who had started hand building Lotus cars had, ten years earlier bought a disused war time airfield which was now used as the test track. Along one side of the perimeter road they had built an extensive office block and car test facilities....

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Prescott Testing and C5 Motor Protection

The objective of the day from my perspective was to access the motor overheat protection systems for which I had been responsible as part of the overall electrical system. Lotus were there to explore downhill braking, fade and overheat characteristics....

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Recollections by Perran Newman

Although my main role in the 'C5 story' was a responsibility for the electrical and electronic aspects of the product, I was present at several of the test programmes when early prototypes and later...

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Latest from C5owners.com

Lotus C5 prototype by John Dunne It's a common misconception that Lotus only involvement in the C5 develop was the Y frame chassis, however as detailed in the Lotus World Magazine March 1985 & also in both of Barrie Will books who was the Managing Director of Sinclair Vehicle, Lotus developed, designed & build the C5 prototypes.
Lotus C5 prototype by John Dunne
posted on: 24/05/2020
Simplified Relay Controls This article by John Wilson shows how to re-wire a C5 with the original 12V motor.
Simplified Relay Controls
posted on: 27/04/2016
Control Clerk Training Notes Here are some rare C5 training notes from Hoover desgned for call centre staff and engineers.
Control Clerk Training Notes
posted on: 22/03/2016
Offroad Prototypes by Brian McCool For years there had been rumors about the Off Road C5's. Has anybody seen one?
Offroad Prototypes by Brian McCool
posted on: 10/03/2016