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

ROAD CAR AND TRACTOR MOTORS. 105 nozzle, and to which heated air is supplied from the bend a, terminating in a sleeve surrounding the exhaust pipe x3; the groove on this spindle is so arranged that the water supply is äutomatically cut-off when starting and when running 011 petrol. The change-over fuel plug t is directly connectecl to a single-jet nozzle, which projects at right angles into a con-divergent air nozzle b ; outside this, the choke-tube b, and arranged to slide over it, t liere is an air regulator r, which is held in the position shown by a pair of springs, when the motor is running throttled up ; but is drawn forward by suction eftect in varying degree, according to the further opening of the main throttle h on the speedirig-up of the motor, thereby admitting a supplementary supply of air through a port a1. A second throttle h1, linked up to the main throttle h, Controls the supply of moist air—i.e., hot air and water spray—which is conducted by a lagged pipe s to mix with t lie vaporized mixture of fuel and air just before entering the manifold. The carburettor is located just behind the dashboard and connectecl direct to the rear end of the vaporizer v, v1, of which the forward end is connected by a lagged pipe m to a point midway along the inlet manifold. The vaporizer consists of a flanged casting having a rib running along at each side, for the purpose of dividing the exhaust manifold, into an upper and lower chamber x1, x2, to which exhaust from*the motor enters along brancli pipes x ; the exhaust then passes from the upper chamber x1 to the lower half x2, by way of a series of cross tubes v1, so arranged that the mixture in its passage from the carburettor to the outlet pipe must impinge against several tubes. The heating surface is considerable,