A stacking stand for adjustably supporting at least one visual image projection device relative to a screen. The stacking stand comprises a support member and a support frame for carrying the projection device. The support frame is pivotably mounted on the support member by a ball and socket pivot joint located near the center of mass of the projection device. The pivot joint allows rotation of the support frame about pitch, roll and yaw axes. In addition, fastening means are provided for locking the support frame relative to the support member in various adjusted positions along the pitch, roll and yaw axes. Thus, an image projected by the projection device onto the screen may be superimposed with a target area on the screen by a rotary adjustment of the projection device along the pitch, roll and yaw axes.

A leveling head for a camera has four jacking screws attached to a base plate. A ring is pivotably attached to a hub on the base plate. A top plate is pivotably attached to the ring and supported on the jacking screws. The top plate can pivot along two perpendicular axes relative to the base plate, to provide a level mounting surface for a camera. A spring on the base plate pushes the top plate upwardly, to partially counterbalance the weight of the camera, to reduce the turning force needed on the jacking screws.

A torpedo is provided in a static test fixture where the engine, normally iven by the combustion of otto fuel is driven from a land based source of superheated steam. The torpedo's otto fuel engine is operated on steam and the need for a combustor and other fuel related components is eliminated. Such components are replaced by a steam line and a steam adapter. The torpedo's fuel tank is replaced with an extender section where the steam supply is connected and fed to the steam adapter. The need for storing combustible fuel and oxidizer agents on site is eliminated. The usual support and safety equipment required for handling of otto fuel and explosive devices are also eliminated.