Rubber Compounds as Energy-Storing Devices for Weapons
Technical rept. Jul 1974-Jun 1975
ROCK ISLAND ARSENAL IL GENERAL THOMAS J RODMAN LAB
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Compounds based on fluorovinyl silicone and blends of fluorovinyl silicone with a phenyl vinyl silicone or a vinyl silicone were evaluated as materials for use in energy-controlling devices. Several test compounds exhibited properties such that further tests under actual end-use conditions were deemed necessary. The opportunity for such tests became available through an urgent request as to the feasibility of the use of rubber as a replacement of the helical extractor spring currently used in the Mechanized Infantry Combat Vehicle, Firing Port Weapon. The metallic extractor springs were manifesting premature failure due to fatigue. Springs fabricated in several sizes from three of the most promising rubber compounds were subjected to firing tests. A spring fabricated from the fluorovinyl silicone compound remained functional after more than 15,000 rounds. A preliminary investigation of the effect of various spring shapes was undertaken. The frustum of a right circular cone configuration produced results that warrant further investigation.
- Elastomers and Rubber