[Off Road Driving] Corrugations

[Disco]

DRIVING OVER CORRUGATIONS

The key to minimising vibration to the vehicle is to travel over corrugations at harmonic speed. This is between 40-60 km/h (25-38 mp/h), but the speed may vary depending on the height and length of the corrugations. Whilst feeling comfortable inside the vehicle, the tyres, axles and suspension are still being stressed.
If the corrugations have been formed by a 'Road Train' or other heavy vehicles they will more than likely be unpleasant for a 4 wheel drive. This is because the harmonic action of a 'Road Trains' suspension and tyres which formed them in the first place are different to that of a 4 wheel drive.
Just as the key to the formation of corrugations is the harmonic action of the vehicle, then the key to minimising stress is to find the best possible speed in which to travel over them, known as 'Harmonic Speed'. Land Rover nominates the harmonic speed for their vehicles as between 40-60 km/h (25-38 mp/h).