Head to head impact test data
| Headgear | Speed (m/s) | Front boss to side | Forehead to rear | ||||
|---|---|---|---|---|---|---|---|
| Peak linear accel. (g) | HIPmax (kW) | HIP concussion risk (%) | Peak linear accel. (g) | HIPmax (kW) | HIP concussion risk (%) | ||
| accel., acceleration; HIPmax, maximum Head Impact Power. | |||||||
| Bare head | 2 | 31.4 | 1.5 | <5 | 39.7 | 2.1 | <5 |
| 3 | 81.4 | 7.0 | 10.9 | 84.1 | 6.2 | 8.4 | |
| 4 | 120.2 | 13.6 | 55.9 | 132.3 | 13.6 | 55.7 | |
| 5 | 160.9 | 21.5 | >95 | 168.5 | 19.8 | 92.0 | |
| A | 2 | 20.6 | 1.1 | <5 | 23.7 | 1.2 | <5 |
| 3 | 55.2 | 4.6 | 5.0 | 60.0 | 4.1 | <5 | |
| 4 | 106.2 | 11.8 | 40.3 | 107.2 | 10.9 | 32.7 | |
| 5 | 144.4 | 20.3 | 93.1 | 151.1 | 17.8 | 85.0 | |
| B | 2 | 25.7 | 1.4 | <5 | 26.3 | 1.3 | <5 |
| 3 | 59.7 | 4.9 | 5.4 | 68.0 | 4.8 | 5.3 | |
| 4 | 97.9 | 10.4 | 28.6 | 116.8 | 11.8 | 40.3 | |
| 5 | 140.2 | 18.0 | 86.0 | 157.0 | 18.6 | 88.3 | |
| C | 2 | 10.1 | 0.7 | <5 | 13.1 | 0.7 | <5 |
| 3 | 26.6 | 2.4 | <5 | 29.2 | 1.9 | <5 | |
| 4 | 69.4 | 7.8 | 14.0 | 61.2 | 5.8 | 7.3 | |
| 5 | 88.4 | 12.4 | 45.4 | 92.8 | 10.8 | 32.2 | |