Shock tactics

A former 'top secret' McLaren Formula One component will be available to all race teams following a deal between its UK developers and a US motorsport technology group.

The suspension device, code-named the 'J-Damper' has been used by

since 2005 under a confidential arrangement between the team and

. Called an inerter, it is used to improve mechanical grip but can offer greater flexibility in a vehicle's suspension system. Standard suspension systems are based on two components—springs and shock absorbers (dampers).

These systems are designed to keep vehicle occupants from rolling around when the car corners, springing back when it speeds up or feeling discomfort travelling down a bumpy road.

Yet, no matter how well a suspension system is designed, there is usually a compromise between handling, comfort and grip. Even in F1 cars, where comfort is less important, the suspension needs to be set to allow sensitive handling and good mechanical grip. But sensitive handling usually requires harder suspension, and good mechanical grip usually needs a softer suspension. So there is still some oscillation because the load on the tyres varies and this impedes the vehicle's grip, slowing it down.