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

68 VAPOBIZING OF PARAFFIN. as shown in clotted lines, thus covering the opening leading to the coil, will cause the mixture, as with petrol, to flow direct to the passage communicating with the portways around the piston throttle A, the mixture then passing through the piston t1, when the vaporizing coil is completely cut out of action, consequently the petrol mixture will then flow direct to the admission valves just as obtaining in an ordinary petrol motor. At the carburettor end of the vaporizer there is the usual double- cone choke-tube c, into the throat of which the spray nozzle z is arranged to project a single jet across the air current, the feed of which can be regulated by a pin valve v. Although only a single float-cistern is shown, it is the practice in this make for all the larger niotois to have a separate feed cistern for each fuel; as shown, the supply pipes leading from the paraffin and petrol tanks are connected up to a two-way plug t, by a to and fro movement by which the fuel can be mixed, thus economising the consumption of petrol useel for starting. According to this, the Remington system, only about one-third the total volume of air is drawn past the spraying nozzle. when running with open throttle, but with the throttle in position for running with the motor deelutehed—i.e., nearly closed—there will be no opening of the extra air valve. The primary supply entering at a can be adj usted to the particular requirements of the running conditions by a ported sleeve a1, and the supplementary air by a sleeve et2, in addition to which this supply can be further controlled by varying the tension of the air valve spring by an adj ustment of the thimble a3. To clear the coil from carbonaceous deposit, which tends to choke and restrict the flow, a good plan