A skidpad or skidpan [1] is a circular area of flat pavement used for various tests of a car's handling. The most common skidpad use is testing lateral acceleration, measured in meters per second squared (m/s2) or the scaled unit g-force. This usage has similarities to that of using a kick plate. [2]
A car's maximum g-force on a skid pad says something about the grip of the car on winding roads, or how fast it can drive in corners without losing grip. Some factors which can aid in achieving higher g-force are high power, wide tires, low mass, appropriate suspension setup and large downforce.
The test is carried out on a circular track with a defined radius. A car driving on said track is slowly accelerated, until the outermost tires on the car begin to slip. Going any faster would cause the car to drive outside the defined radius. At this point, the speed of the car is recorded, and given the centripetal acceleration formula (by the formula v²/r, that is velocity squared divided by radius) the car's handling in terms of the maximum of lateral gs can be derived. [3]
A new world record was accomplished in November 2020, when the Porsche Taycan set the Guinness World Records best mark for longest electric vehicle drift on the skidpad (measured in time). The car stayed sideways for 42 km (26 mi) in 55 minutes. [4]
The world record for the fastest skidpad run in an official competition was achieved by TU Graz Racing from the Technical University of Graz. With a final time of 4.135 s at Formula Student East 2024, the team beat their old record of 4.355s, set at Formula Student Austria 2024, by 0.220s. [5]
Vehicle dynamics is the study of vehicle motion, e.g., how a vehicle's forward movement changes in response to driver inputs, propulsion system outputs, ambient conditions, air/surface/water conditions, etc. Vehicle dynamics is a part of engineering primarily based on classical mechanics. It may be applied for motorized vehicles, bicycles and motorcycles, aircraft, and watercraft.
The Porsche 959 is a sports car manufactured by German automobile manufacturer Porsche from 1986 to 1993, first as a Group B rally car and later as a road legal production car designed to satisfy FIA homologation regulations requiring at least 200 units be produced.
Understeer and oversteer are vehicle dynamics terms used to describe the sensitivity of the vehicle to changes in steering angle associated with changes in lateral acceleration. This sensitivity is defined for a level road for a given steady state operating condition by the Society of Automotive Engineers (SAE) in document J670 and by the International Organization for Standardization (ISO) in document 8855. Whether the vehicle is understeer or oversteer depends on the rate of change of the understeer angle. The Understeer Angle is the amount of additional steering that must be added in any given steady-state maneuver beyond the Ackermann steer angle. The Ackermann Steer Angle is the steer angle at which the vehicle would travel about a curve when there is no lateral acceleration required.
Automobile handling and vehicle handling are descriptions of the way a wheeled vehicle responds and reacts to the inputs of a driver, as well as how it moves along a track or road. It is commonly judged by how a vehicle performs particularly during cornering, acceleration, and braking as well as on the vehicle's directional stability when moving in steady state condition.
A highsider or high-side is a type of motorcycle accident characterized by sudden and violent rotation of the bike around its longitudinal axis. This generally happens when the rear wheel loses traction, skids, and then suddenly regains traction, causing the rider to be thrown head-first from the side of the motorcycle or over the handlebars.
Weight transfer and load transfer are two expressions used somewhat confusingly to describe two distinct effects:
The Nardò Ring, originally known as Pista di prova di Nardò della Fiat when it was built in 1975, is a high speed test track located at more than 23 kilometres (14 mi) north-west of the town of Nardò, Italy, in the southern region of Apulia, in the Province of Lecce. It was acquired by Porsche Engineering in 2012 from its former owners, Prototipo SpA. Porsche now calls the site Nardò Technical Center.
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Bicycle and motorcycle dynamics is the science of the motion of bicycles and motorcycles and their components, due to the forces acting on them. Dynamics falls under a branch of physics known as classical mechanics. Bike motions of interest include balancing, steering, braking, accelerating, suspension activation, and vibration. The study of these motions began in the late 19th century and continues today.
The Caterham Seven CSR is the latest model from sports car manufacturer Caterham Cars. The CSR is the most heavily modified Caterham, though it still retains the basic look of the Super Seven. The CSR has two engine options based on the same Duratec block, though modifications and power output differ. The entry level engine produces 200 bhp (149 kW), with a 0–60 mph (0–97 km/h) time of 3.7 seconds. The upgraded engine produces 260 bhp (194 kW), with a 0–60 mph (0–97 km/h) time of 3.1 seconds and a top speed of 155 mph (249 km/h).
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An automobile skid is an automobile handling condition where one or more tires are slipping relative to the road, and the overall handling of the vehicle has been affected.
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