Kask is committed to creating products that guarantee safety and comfort, exceeding all requirements set by international standards and norms. Now their helmets have passed the WG11 standard, they’ve surpassed the competition once again.
Below you’ll find details of the WG11 standard and how their helmet technology fared in these more rigourous tests.
Most tests on helmets that use rotational impact prevention technologies are carried out using headforms whose coefficient of friction is much higher than those of the human skull and therefore do not reflect reality.
A major goal of WG11 is to define a test method to measure the ability of a helmet to absorb energy from this rotational impact.
The test is simple, robust, and reliable.
The WG11 test design uses impact conditions based on real accident data.
BrIC is an algorithm that defines the level of a brain injury. To simplify, to a lower number corresponds a lower risk of concussion. Concussive (AIS2+) values of BrIC for humans varied from 0.60 when scaled directly from animal data (Ommaya, 1985) to 0.68 when obtained directly from college football players (Development of rotational Brain Injury Criterion (BrIC), Human Injury Research Division, UNECE)
AIS is the Abbreviated injury scale: The Abbreviated Injury Scale (AIS©) incorporates current medical terminology providing an internationally accepted tool for ranking injury severity. AIS is an anatomically based, consensus derived, global severity scoring system that classifies an individual injury by body region according to its relative severity on a six point scale (1= minor and 6= maximal). AIS is the basis for the Injury Severity Score (ISS) calculation of the injured individual, according to the Association for the Advancement of Automotive Medicine (AAAM).
The limits KASK has defined or this test are also based on the following studies and norms:
- Development of rotational Brain Injury Criterion (BrIC), Human Injury Research Division, UNECE
- Development of Brain Injury Criteria (BRIC), Stapp Car Crash Journal
- MIPS related results on motorcycle helmets, Peter Halldin, Division of Neuronic Engineering Royal Institute of Technology (KHT), Stockholm, Sweden
The final test protocol is:
Oblique impact tests:
Oblique tests at 45°. Impact speed 6 m/s. BrIC < 0.68
+ grade 80 closed-coat aluminum oxide abrasive paper
+ headform nominal coefficient of friction 0.3
+ wireless system: triaxial accelerometer + n. 3 ARS
Headform: EN960 serie
Peak of rotational acceleration plus Peak of linear acceleration of HIC, BRIC (< 0.68)
All kask helmets successfully pass this test, with values that are never above a BrIC 0.390.