DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
Some Aspects of the Evaluation of the Useful Life of Nylon Parachutes and Parachute Materials
QUARTERMASTER RESEARCH AND DEVELOPMENT CENTER NATICK MA
An aim of the current work on parachute service life is to determine the limits of degradation to be expected which can serve as a basis for determining the extent and severity of the deterioration problem. The approach being followed is to subject parachute components and sub-assemblies to degrading influences such as light, heat and storage under various climatic conditions for periods of time up to and exceeding what might be encountered under the most severe use conditions. From such data, extrapolations may be made to determine the potential residual service life of existing stocks of parachutes with known use and storage history. With such knowledge, decisions regarding serviceability may be made on a statistical sampling basis rather than 100 inspection. The specific studies which form a part of our current program are Solar and ultra-violet radiation Wetting and drying in sunlight and drying equipment Permanent set during storage Mechanical damage in use and maintenance Durability of seams and thread Deterioration due to chemical atmospheric agents Fatigue due to repeated impact loading. Author
Approved for public release; distribution is unlimited., Availability: Document partially illegible.