Test equipment—(1) Headforms. The test headforms shall comply with the dimensions of the full chin ISO reference headforms sizes A, E, J, M, and O.
Test fixture. The headform shall be secured in a test fixture with the headform's vertical axis pointing downward and 45 degrees to the direction of gravity (see Figure 7 of this part). The test fixture shall permit rotation of the headform about its vertical axis and include means to lock the headform in the face up and face down positions.
Dynamic impact apparatus. A dynamic impact apparatus shall be used to apply a shock load to a helmet secured to the test headform. The dynamic impact apparatus shall allow a 4-kg (8.8-lb) drop weight to slide in a guided free fall to impact a rigid stop anvil (see Figure 7 of this part). The entire mass of the dynamic impact assembly, including the drop weight, shall be no more than 5 kg (11 lb).
Strap or cable. A hook and flexible strap or cable shall be used to connect the dynamic impact apparatus to the helmet. The strap or cable shall be of a material having an elongation of no more than 5 mm (0.20 in.) per 300 mm (11.8 in.) when loaded with a 22-kg (48.5 lb) weight in a free hanging position.
Test procedure. (1) Orient the headform so that its face is down, and lock it in that orientation.
Place the helmet on the appropriate size full chin headform in accordance with the HPI and fasten the retention system in accordance with the manufacturer's instructions. Adjust the straps to remove any slack.
Suspend the dynamic impact system from the helmet by positioning the flexible strap over the helmet along the midsagittal plane and attaching the hook over the edge of the helmet as shown in Figure 7 of this part.
Raise the drop weight to a height of 0.6 m (2 ft) from the stop anvil and release it, so that it impacts the stop anvil.
The test shall be repeated with the headform's face pointing upwards, so that the helmet is pulled from front to rear.
Copyright ©2024 LegalFix. All rights reserved. LegalFix is not a law firm, is not licensed to practice law, and does not provide legal advice, services, or representation. The information on this website is an overview of the legal plans you can purchase—or that may be provided by your employer as an employee benefit or by your credit union or other membership group as a membership benefit.
LegalFix provides its members with easy access to affordable legal services through a network of independent law firms. LegalFix, its corporate entity, and its officers, directors, employees, agents, and contractors do not provide legal advice, services, or representation—directly or indirectly.
The articles and information on the site are not legal advice and should not be relied upon—they are for information purposes only. You should become a LegalFix member to get legal services from one of our network law firms.
You should not disclose confidential or potentially incriminating information to LegalFix—you should only communicate such information to your network law firm.
The benefits and legal services described in the LegalFix legal plans are not always available in all states or with all plans. See the legal plan Benefit Overview and the more comprehensive legal plan contract during checkout for coverage details in your state.
Use of this website, the purchase of legal plans, and access to the LegalFix networks of law firms are subject to the LegalFix Terms of Service and Privacy Policy.