Tech F1i – Belgian GP analysis

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FERRARI’S NEW HEAVE SPRING UNIT

Ferrari sampled a new version of its heave spring unit, also known as ‘third suspension element’, in Spa. Basically, the other two suspension elements encompass the torsions for each wheel, as well as the anti-roll bar. It should be noted that the image above depicts the previous model, as no image of the latest design could be found for once.

By linking the left and rights wheels, the heave spring controls dive under braking – or more generally the pitch movement depending on the downforce –, as well as the cars’ ride height.

In other words, it increases damper stiffness when necessary (at high-speed on a straight-line, when there is a surge in aero load), while remaining neutral in cornering.

This means the third suspension element has an impact on the front wing as well as on the car’s stability. Should the machine dive too far forwards, the splitter would rub against the track, which would lead to excessive and illegal wear of the skid block.

One can therefore appreciate how crucial the heave spring is on any F1 car, on top of its usual purpose as part of the suspensions system.

It is believed the new heave spring unit was assessed during the post-Hungarian Grand Prix test, with the element offering better rake on the SF70H.