Dual-thrust nozzle apparatus for rockets

摘要

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.PP 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.