This cannon mount required an elevated intake manifold design, bringing the intake runners straight off the inner surfaces of the cylinder banks to the updraft carburetor's plenum chamber.

An arsenal of cannon mounted in its fuselage can pour constant fire on to a target as it circles overhead.

I can imagine circumstances in which a water cannon mounted on your bonnet would have a legitimate use.

They have cannons mounted on the front which (when they work) fire ice cubes.

After the 15th-century introduction of gunpowder, elephants served as tanks with cannons mounted on their backs.