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

48 VAPORIZING OF PARAFFIN. cylinder. Exhaust-heated vaporizers, now in connection with. automobile motors known as paraffin carburettors, have the furt her advantage of enabling an engine (1) to be started colcl on petrol with the same facility as a simple petrol motor, or an ordinary gas engine ; (2) to be run with throttle or cut-out control; and (3) to be capable of developing more power with a given weight than can be obtained on any other vaporizing system in engines adaptecl for running on paraffin oils. The earliest application of this principle in combina- tion with an induction spray carburettor, now so ex- tensively used for enabling ordinary petrol motors to be run on paraffin, was made by the writer in 1890. According to this, illustrated in Figs. 37 to 39, an inspirator or induction spray carburettor of the kind shown in Fig. 16 is connected up to an exhaust-heated vaporizer adapted for either being heated by a lamp, as shown in Fig. 37 for starting, or as in Figs. 38 to 39 for being started on petrol or ordinary illuminating gas. Ref erring to the example shown in Fig. 37, which illustrates a form of vaporizer adaptecl for powers below 20 to 30 H.P., and actually used on a twin-cylinder, vertical, 6" x 8", Clark-Chapman paraffin engine fitted in a 15-ton yacht in 1893, and is of interest—in the light of the present and future importance of oil power on land and water to state —was probably the first to make an oil-propelled open sea passage in British waters—viz., from Larne Harbour to Greenock, a distance of some 90 to 100 miles, which was accomplished by a non-stop run in nine hours against a slight head wind. In this instance the vaporizer was adapted for being either heated by a blow lamp or by a preliminary run of two or three minutes on petrol, the