Abstract: A ram jet rocket includes a precombustion chamber having a solid fuel propellant which burns off so that the gases generated are deficient in oxygen when they pass through a central aperture of a valve body into a main combustion chamber in which they are further burned. The valve body aperture is closed by a bore control member which is urged into a proper setting position by a push rod mounted behind the ball downstream of the aperture. The valve body defines an annular nozzle extending from the aperture downstream through one or more elbow passages into a corresponding number of axially extending passages into the main combustion chamber. The valve construction is characterized by at least one by-pass passage which extends from the upstream end of the valve body into the elbow passage which leads to the axial passage.

Abstract: A thrust nozzle for a reaction engine having a combustion chamber with a sustained flight discharge nozzle defined therein for the passage of thrust gases and a sustained flight thrust arrangement connected to the combustion chamber for supplying thrust gases through the combustion chamber, the thrust nozzle comprising a starting nozzle formed on an interior wall of the combustion chamber radially inwardly of the sustained flight discharge nozzle made of a plurality of layers of ablatable material which are ablated by the passing thrust gases to discharge vaporized or fragmentary parts of the layers of ablatable material.

Abstract: A valve arrangement for varying a cross-sectional flow area of hot gases, particularly the fuel-rich gases of a ramjet engine, comprising, a housing, a valve seat defining an intake opening for the hot gases in the housing, a conduit in the housing connected to the valve seat for supplying hot gases to the intake opening and a valve body which is slidably mounted in the housing and movable toward and away from the valve seat to vary the flow area of the hot gases. The valve body is driven by a worm mechanism having at least one spur gear directly connected to the valve body through pins which extend through inclined or helical slots in the valve body so that, rotation of the gear causes rotation and linear movement of the valve body.