The Vaporizing Of Paraffin for High-Speed Motors
(Electric Ignition Type)

VAPORIZATION IN THE HIGH-SPEED MARINE ENGINE. 59 starting, is adapted for high speeds, and is c omparat ively light and compact for the power developed. Successful running of motors of this type is not only influenced, as in petrol motors, by the regularity of the mixture supply under varying conditions of load and throttle opening. but more particularly to the maintenance of a suitably equable temperature of the vapprizer, also to the application of some medium, such as a water spray or inert gas, for suppressing the violence of the explosive action in the cylinder when working on a continuous full load. The running conditions, however, associated with marine propulsion are peculiarly favourable to the paraffin motor, insomuch as the load is comparatively constant and plenty of water for regulating the cylinder temperature is available, and to a great measure in consequence of this, motors of the paraffin vaporizer type have made more headway in this application than any other, as will be seen by the number and variety of vaporizing systems that are in use in motors specially designed for this purpose, as follows :—In order to avoid dependence on hanel control to compensate for changes of load, speed, and other conditions, the auto- matic paraffin vaporiser illustrated in Fig. 41 has been designed by the writer for a marine motor ; in this, temperature is regulated by synchronous control of the mixture admission throttle li, with another x2, in the exhaust by-pass connection x1, thus diverting more or less of the hot gases according to the opening of the admission throttle li, the rod g being connected to a go vernor, from which is communicated the control movement to the exhaust throttle, through the rod g1 ; thus, as h is opened, x2 is also opened to a proportionale