What uses is an internal-explosive engine fit for, then?
It is perfectly adapted for purposes where only a constant power is wanted at a constant speed. The two most conspicuous examples of this are the aeroplane and the motor boat. These are constant-speed, constant-power devices. Land vehicles are not in this class. But the best example is a stationary plant, in a loft building, for instance, where not only the power and speed are constant, but the temperature and humidity as well.
