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

-62 VAPOBIZING OF PARAFFIN. depression below the throttle, but more so by the inspir- ative action of the mixing nozzle. In the exhaust-lieated paraffin vaporizer, illustrated in Fig. 42, as used in the Thornycroft motor-boats, part of the exhaust from the motor outlets x, or the whole ■of it, can be caused to circulate up one side and down the other of the vaporizer jacket xl, by the throttle x'2; or again, as when for any reason it may be clesired to run -on petrol, the exhaust from x can be made to flow straight Fig. 42.—Single-jet coiubincd Carburettor and Paraffin Vaporizer Shunt-throttle on the Exhaust. through to x3. By this means the temperature of the vaporizer can be conveniently regulated to suit any particular grade of paraffin. Petrol is uséd for starting, the starting and running fuels being supplied to fioat cisterns / from the main tanks along pipes k, and thence either one or-the other can be fed to the central jet spraying nozzle arranged to feed direct across the air stream, flowing from a down the con-divergént nozzle c