Impact Protection Assessment of the Redesigned Oregon Aero ZetaLiner Fitting System in the HGU-56/P Aircrew Integrated Helmet System
Abstract
The HGU-56/P Aircrew Integrated Helmet System (AIHS) uses the thermoplastic liner (TPL) to provide wearers with a custom helmet fit. While the TPL provides a comfortable helmet fit for most HGU-56/P AIHS wearers, there is a portion of the aviation warfighter population who cannot be comfortably accommodated by the TPL. Oregon Aero, Inc. markets an alternative helmet fitting system for the HGU-56/P AIRS (this fitting system is referred to as the Zetal throughout the manuscript). The impact of replacing the TPL with the Zetall fitting system on the blunt impact protection provided by the HGU-56/P AIHS is unknown. Fifty two (52) new HGU-56/P AIHSs in four sizes (small, medium, large, and extra-large) were subjected by blunt impact evaluations in accordance with the HGU-56/P purchase description. The TPL in each helmet was replaced with a 1/4-inch thick Zetall fitting system. Peak head accelerations measured during these trials were compared to peak head acceleration limits. Listed in the HGU-56/P AIHS purchase description; peak head accelerations exceeding the limits set forth in the purchase description represented reduced blunt impact protection. Peak head accelerations measured during this evaluation remained below these specified limits, indicating that the impact protection of the HGU-56/P AIHS is not degraded with the use of the Zetall fitting system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2008
- Accession Number
- ADA478747
Entities
People
- Amy Harvey
- Frederick Brozoski
- James Lindsey
- Joseph Licina
- Katie Padgett
- Kimberly Vasquez
- Shean Phelps
Organizations
- United States Army Aeromedical Research Lab