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

VAPORIZÄTIOX IN THE HIGH-SPEED MARINE ENGINE. 71 x2 and outlet x3; as shown, air is admittecl by a regulator a for atomizing the fuel jet, and this air during its passage through the chamber a1 gets heated and is then drawn. down the opening a2 cut in the dividing plate separating the upper from the middle chamber, and then up through the choke-tube n, whence the vaporized spray and atom- izing air is drawn along a tortuous path through the vaporizing chamber v, as shown by the arrows, to the opening v1 leading to the passage v2 alongside the air flue a1, where diluent air is admittecl by the valve a3 ; the mixture from this point is drawn along the pipe s past throttles t1 and t, to the inlet ä1, which connects with the tour admission valves of the motor w. One point worth noting is the absence of a joint separating the mixture from the exhaust ; another is, by the removal of the upper cover and dividing plate, the whole of the vaporizing surface can be opened up to view ; also by unscrewing the wing-nut holding the spray nozzle n1 in position, this can be removed from below. In another vaporizer (Figs. 51 to 54), known as the Barcar, and used in the petrol-paraffin marine motors made by the Phænix Company, the fuel is spray ed from a multiple jet t on lines somewhat similar to the Polyrhoe carburettor (vide Figs. 34 and 35, anté)—i.e., by adjusting the area of the passages a1, a2 for the air supply, simul- taneously with a correspondingly varying number of fuel jets thus brought into action, this taking effect in direct ratio with the throttle opening. The jets—some 10 or 12 in number—are fed from a single float cistern f provided with a two-way control plug for the starting and running fuel supplied along the two pipes connecting with the two-way change-over plug ; the jets issne from