Final Static and Dynamic Tests of the Fluid Magnetic Spring and Lockout Device for Polaris Launch Tubes

摘要

The object of the development and the final series of tests was to demonstrate that the prototype would provide a linear spring when nonmagnetized and essentially a hardened lockout device when magnetized. The results of the tests indicate that the Magnetic Spring is essentially a linear liquid spring when nonmagnetized and provides definite evidence of viscosity control of the working fluid when magnetized. Complete lockout characteristics were not fully demonstrated. However, the data indicate that under both static and dynamic conditions there is a definite change in the slope of the force deflection curve, which can be converted to complete lockout by redesigning the basic mechanical mechanism and orifice configuration. The redesign features made evident during these tests indicate that the amount of compressible fluid ahead of the magnetic orifice should be decreased appreciably, the slurry should be the only fluid used in the device, and the coil size and length of magnetic orifice should be increased to obtain the desired lockout effect. (Author)