Accession Number:

ADA383420

Title:

Evaluation of the Effects of the ZetaLiner During Helmet Impact

Descriptive Note:

Interim rept. Aug-Nov 1999

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1999-11-01

Pagination or Media Count:

36.0

Abstract:

An experimental effort was conducted to compare the ZetaLiner, a new foam flight helmet liner manufactured by Oregon Aero, to the Thermal Plastic Liner TPL, the helmet liner used in the USAFs standard flight helmet, the HGU-55P. The liners were compared based on their effectiveness in attenuating impact acceleration and minimizing head injury potential. A series of vertical drops with a Helmet Drop Tower HDT were conducted using HGU-55P flight helmets, TPLs, and several ZetaLiner samples. In addition to the liner comparison, helmet impacts were also conducted to evaluate Oregon Aeros Ballistic Liner Upgrade BLU compared to the rigid foam liner used in the HGU-55P. All tests exposed the helmet shell to impacts against a hemispherical anvil as outlined in military standard MIUH-87174. The probability of head injury, as defined by the Head Injury Criteria HIC, was calculated using measured impact acceleration of the HDT headform for each helmet configuration. Test results indicated that all impact configurations passed the acceleration standard as outlined in MIL-H-87174. The headform acceleration, resulting HiC values, and probability of severe brain injury values for the ZetaLiner tests were less than the comparative values for either the standard ACES II TPL or the HGU-55P helmet with the BLU.

Subject Categories:

  • Protective Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE