Accession Number:

AD0608357

Title:

THERMAL STABILITY OF FLEXIBLE FIBROUS MATERIALS,

Descriptive Note:

Corporate Author:

RESEARCH AND TECHNOLOGY DIV BOLLING AFB D C

Personal Author(s):

Report Date:

1964-10-01

Pagination or Media Count:

34.0

Abstract:

The continuing need for new thermally stable fibrous materials for the protection of aircrew decelerators prompted an investigation to develop a laboratory technique for simulating the heat and air flow encountered in aircraft fires. With the device available, a number of fibrous materials in single and multiple layers were characterized for thermal stability in the environment simulating that encountered during emergency escape from burning aircraft. This environment involved exposure to 1200 or 1400F for 10 seconds at an air flow of 225 ftmin. Materials evaluated were primarily HT-1 in various weaves and thicknesses, as well as an HT-1 paper and nylon, Dacron, asbestos, and carbon fabrics. The results indicated that a double layer of HT-1 fabric 7.25 ozs sq yd was found to provide superior resistance to heat transfer during the 10-second exposure. Triple layer materials provided no additional thermal protection based on the weight of the structures evaluated. These data confirmed previous data obtained from simulated fire tests carried out with complete personnel decelerator systems. Fabrication of 75 personnel decelerator harnesses and packs is being carried out to provide a more extensive evaluation of HT-1 material. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE