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The term porpoising is given to the repetitive rise and fall, or bouncing, of the car, usually on the faster sections of the track.

A technical challenge of ground effect cars was reintroduced in the 2022 regulations revamp. In simple terms, aerodynamics work such that they create a suction effect onto the track. The car is pulled down onto the track until it touches, breaking the suction and releasing the car to pop back up, only for the suction to pull it down. The pattern is repeated in a quick fashion causing the cars to bounce.

Former F1 driver, Mario Andretti, coined this term in 1979 while driving his Lotus 80 at Silverstone in reference to the aggressive bounce that his car was producing. 

Andrew Burden

The author Kiwi F1 Fan