FLUID MAGNETIC SPRING, DAMPER AND LOCKOUT DEVICE FOR POLARIS LAUNCHER MARK 1 MOD O.
JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
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A mixture of 50 per cent carbonyl iron powder 8 micron size and 50 per cent silicone oil has been developed which provides the desired viscosity characteristics between zero and maximum magnetization. A method for sealing the magnetic liquid under high pressure conditions has been developed. A magnetic liquid spring has been built meeting the required spring constants, damping factors, and lockout characteristics can be met. A method for maintaining the mixture in solution, without settling of the iron particles, has been developed. By placing the coil inside the spring, around a comparatively long orifice pipe, it may be possible to build smaller, lighter, and more versatile liquid springs. The amount of electrical energy required to provide 600 to 2300 lb forces over a 1-inch requires approximately 25 watts for maximum magnetization.
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