- Skid block
A skid block is a common term for a mandatory attachment to the underside of a
Formula One racing car. It is a flat rectangle, usually made of a wood composite, designed to impose a minimumground clearance and to limit the use ofground effects to enhance handling.pecification
According to the technical specifications governing F1, a rectangular skid block must be fitted beneath the central plane of the car. This skid block may comprise more than one piece but must:
# extend longitudinally from a point lying 335mm behind the front wheel centre line to the centre line of the rear wheels
# be made from a homogeneous material
# have a width of 300mm with a tolerance of +/- 2mm.
# have a thickness of 10mm with a tolerance of +/- 1mm.
# have a uniform thickness when new.
# be fixed symmetrically about the centre line of the car in such a way that no air may pass between it and the surface formed by the parts lying on the reference plane.Typical construction
The Skid Block was introduced as part of the safety changes that followed
Ayrton Senna 's death. The block is usually comprised of a material calledJabroc . Jabroc is made of beechwood and built in acomposite process.Veneers are layered and a high strength resin is used in each layer. They are pressurized and pressed, and brought to a certain and very consistent material density. As a result each Jabroc skid plank is all but identical in terms of wear rate and material density. The plank does not in itself restrict airflow under the car. It is used as a gauge which restricts the minimum ride height attainable by the car. The closer the car is to the ground, the more efficient the front wing and rear diffuser. The higher the down force levels, the faster a driver may corner. Cornering at high speed is considered excessively dangerous and so the skid block was introduced to counteract this. The thickness of the plank is one of theparc ferme tests. If it is found to be worn beyond the allowed limit the car is disqualified.Violations
Michael Schumacher was disqualified for an excessively worn plank in the Belgian GP in 1994. Schumacher spun out across the kerb at Puhon corner. The kerb carved a pattern out into the plank, but the FIA ruled it illegal anyway.Jarno Trulli in a Jordan was also disqualified for plank wear after the 2001 US GP.
Wikimedia Foundation. 2010.
