Heard about the HANS device used in NASCAR but not sure what it is?
As part of its continuing safety initiative, NASCAR became the world’s first major auto racing sanctioning body to mandate the use of an approved head and neck restraint by all drivers on every type of race circuit, beginning with the 2002 season.
The HANS Device helps to reduce extreme head motion during accidents and sudden stops. The device is required for use in NASCAR’s three national series – NASCAR Sprint Cup Series, NASCAR Nationwide Series, and NASCAR Craftsman Truck Series – as well as its regional touring series.
(1) Tethers are attached from the collar of the HANS Device to both side’s of the driver’s helmet. The purpose of the HANS is to keep the head/neck moving with the torso and not let the head lead or move in opposition to the torso.
(2) Belts from a six-point safety harness attached to the seat hold the HANS Device in place on the driver’s shoulders. The shoulder belts slow down and limit the movement of the torso and the HANS works in concert with the shoulder belts to reduce the movement of the head/neck more than the torso.
With HANS Device
Upon impact or sudden stop, the two tethers attached to a specially designed shoulder harness help keep the driver’s head and neck in a stationary, upright position.
Without HANS Device
Unrestrained, the head and neck of the driver moves forward and/or to the side as the rest of the body and his car decelerate during impact or sudden stop.
Adapted from information by NASCAR Media