Science

Downforce Calculator

Work out the downforce, fan suction or thrust a car needs to drive upside down on a ceiling, like the 2026 Tesla Roadster, or to hop off the ground.

Start from

A fan pulls air from under a sealed floor, so the suction works even when the car is standing still.

gravitySticks to the surface
Fan suction
4 691 kgf
Pressure drop for a ceiling
5.8 kPa
Weight
2 350 kgf
Hold-down
2.00 g
Force on the tyres
2 341 kgf

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