Abstract: The present disclosure provides a system for hosting an online platform with multiple functionalities, separated into a plurality of interfaces, but all hosted within an integrated system to increase the immersion of a user in the learning experience. Multimedia content streaming, educational course, history, and tracking, and business management functions are provided on the various interfaces that quickly educate a user about a given industry. The platform is industry agnostic but can also be provided with specific functionalities such as competitive tournament hosting for the e-sports industry. Also provided herein is a method of translating an educational lecture from a first language into a plurality of second languages.

Abstract: A housing is mounted to the convergent portion of a convergent-divergent thrust nozzle for rockets via legs that space the housing from the nozzle so that it will not obstruct the flow of propulsive gases therethrough. A cavity in the housing holds a secondary nozzle member having a throat that is smaller in diameter than that of the primary nozzle. An electrically actuated, gas producing device in the housing forces the secondary nozzle member out of its cavity on command and seats it against the convergent portion of the primary nozzle. Simultaneously, ports in the housing are opened to the propulsive gases of the rocket, this forces a plug, that seals the secondary nozzle during storage, out through the primary nozzle.Some embodiments of the invention also provide for attaching a rocket igniter to the housing, so that the electrical wiring to the igniter can pass through the same ducts and holes as the wiring to the gas producing device for deploying the secondary nozzle.

Abstract: In a dual area nozzle automatic mechanical actuation system for a boost-sustain solid propellant rocket motor, a pressure differential is created on the opposite sides of a ball-catch retaining ring when a fast-burning portion of the solid-propellant grain is spent and a slow-burning portion is ignited that allows the blow-out load on the smaller throat orifice of a mechanically restrained movable nozzle section to move the movable nozzle section to seat the smaller throat orifice against the larger throat orifice of a fixed nozzle section.