Abstract: A method of manufacturing an impact-resistant material is described. Embodiments of the method includes hydrating a reinforcing material, which can be, for example, a fabric comprised of para-aramid fiber, infusing the hydrated reinforcing material with a resin, and curing the infused reinforcing material. Certain embodiments include hydrating the reinforcing material by exposing the reinforcing material to humidity and infusing the material by with a prepolymer-based diisocynate, for example, methylene diphenyl 4, 4?diisocyanate.

Abstract: A method of manufacturing an impact-resistant material is described. Embodiments of the method includes hydrating a reinforcing material, which can be, for example, a fabric comprised of para-aramid fiber, infusing the hydrated reinforcing material with a resin, and curing the infused reinforcing material. Certain embodiments include hydrating the reinforcing material by exposing the reinforcing material to humidity and infusing the material by with a prepolymer-based diisocynate, for example, methylene diphenyl 4, 4? diisocyanate.

Abstract: A two-way rotary manifold-selecting valve forming a combustion chamber for an internal combustion engine has a frusto-conical rotor nestingly residing in a housing having a frusto-conical passage communicating with the base of the housing. The housing has a pair of ports through the side, and the rotor has a side passage entering a portion of the slanting side of the rotor and exiting at the base of the rotor. The housing is open at the bottom, and may be affixed co-axially with a cylinder of a piston-type internal combustion engine so that the interior passage within the rotor forms the combustion volume of the cylinder. The small diameter ends of the housing passage and the rotor are disposed at the bottom of the assembly when so installed. A dry-lubricated refractory sealing assembly is emplaced around the rotor and extends outwardly therefrom to engage the inner housing surface, thus holding the rotor at a standoff distance. All wear is thus confined to the seal material and the housing wall.