Which type of ordnance is characterized as unmanned and self-propelled, with uncontrolled flight upon launch?

The type of ordnance that is characterized as unmanned and self-propelled, with uncontrolled flight upon launch, is a rocket. Rockets are designed to be propelled using the thrust generated by their engines, and they typically follow a ballistic trajectory once launched. This means that after the initial propulsion, their flight path is determined by gravity and atmospheric conditions, making it uncontrolled in terms of direction.

In contrast, missiles are typically designed with guidance systems that allow for controlled flight and targeting, which differentiates them from rockets. Drones, while unmanned and self-propelled, are not classified as ordnance in the same context and often have the capability for controlled flight and function based on remote piloting or autonomous navigation. Aircraft are also piloted vehicles and do not fall into the category of ordnance characterized by uncontrolled flight after launch.