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A flying caravel is a cross between a dirigible and a helicopter, having some of the lift supplied by hot air or gas, and some supplied by rotating blades. Some, such as this example, have most of the lift supplied by rotors, with the balloon in place just to lighten the load a bit. The rotors can pivot to move the ship forward, in reverse, or turn, and steering the ship is much like steering a land vehicle with tracks. This particular example is a heavy cargo airship, with each of the twelve engines driving two counter-rotating propellers. The same fuel for the heat-exchange engines (a.k.a. Stirling engines) also heats the balloon. In spite of the twelve engines, this airship is quite efficient, capable of transporting cargo substantial distances, and is ideal for filling in the gaps left by railroads and surface ships. There are only two drawbacks: the cost of building such a ship is quite high (though not nearly as high as a similarly-sized glossarian airship), and there isn't much demand for them, given the proliferation of railroads across Rossbera.