Common use of Neck Clause in Contracts

Neck. 5.6.1. The head-neck interface of the neck is mounted to a special symmetrical certification headform with a mass of 3.9 ± 0.05 kg (see figure 4). 5.6.2. The headform and neck are mounted upside-down to the bottom of a neck-bending pendulum allowing a lateral motion of the system. 5.6.3. The neck-pendulum is equipped with a uniaxial accelerometer mounted at 1,655 ± 5 mm from the pendulum pivot. 5.6.4. The neck-pendulum should be allowed to fall freely from a height chosen to achieve an impact velocity of 3.4 ± 0.1 m/s measured at the accelerometer location. 5.6.5. The neck-pendulum is decelerated from impact velocity to zero by an appropriate device, resulting in a deceleration-time history inside the corridor specified in figure 5 of this annex. All channels have to be recorded using ISO CFC 1000 filters and filtered digitally using CFC 60. 5.6.6. The maximum headform flexion angle relative to the pendulum should be 51 ± 5 degrees and should occur between 50 and 62 ms. 5.6.7. The maximum headform centre of gravity displacements in the lateral and vertical direction should be 97 ± 10 mm and 26 ± 6 mm respectively. 5.6.8. The neck performance can be adjusted by replacing the circular section buffers with buffers of a different shore hardness.