Quote:
2.4 The Head and Neck Restraint System must be designed and manufactured to allow freedom of movement of head, torso, arms, etc., commensurate with operating a race vehicle under all race and associated conditions.
2.5 Adjustment and release mechanism(s) shall be accessible to both the user and to external personnel such that no additional motion is required, other than the release of the seat belts, to disengage the Head and Neck Restraint System during emergency situations.[/b]
It is highly questionable that any device could really pass section 2.4 of the specification, ever try to look ahead into a hairpin with a "properly" installed HANS? And section 2.5 has nothing to do with limiting forces being applied to the H&N which should be the focus of the standard and is a fallacy anyway as mentioned. And lastly if the standard wants to get into release issues then they should address full egress from the car not just releasing the belts and it needs to be a comprehensive standard across the board - egress should be covered by something simple like "from seated position as raced the driver shall be able to egress the vehicle within X seconds without assistance".