. Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional . e to passthrough the main pump E in one direction, as the valvesprevent it from flowing backward. When the water from the pumps reaches the boilercoils, through the center of which the gasolene flame isburning, it instantly *^flashes into steam and by thetime this steam has reached the end of the coils towardthe engine, it has become highly superheat^ed and imparts 170 Model Engineering maximnm power to the piston of the engine. When theengine is st
. Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional . e to passthrough the main pump E in one direction, as the valvesprevent it from flowing backward. When the water from the pumps reaches the boilercoils, through the center of which the gasolene flame isburning, it instantly *^flashes into steam and by thetime this steam has reached the end of the coils towardthe engine, it has become highly superheat^ed and imparts 170 Model Engineering maximnm power to the piston of the engine. When theengine is starting, it is sometimes advisable to manipu-late the hand pump, as this assists the main water pnmpto pick up and produce maximum pressure in the waterflow. After the engine is working satisfactorily, thesmall hand pump F is cut off from the rest of the systemby means of a valve shown at H. The engine is nowable to drive the water pump E, which is pow^erful enoughto produce the necessary flow of water in the boiler engine is also required to drive the small oil pumpwhich is shown at I. This pump is supplied with lubri- SUPPLY COCK. Fig. 114—Drawing of a gasolene torch for a flash-steam boiler eating oil through the reservoir M. The gear ratios ofthe pump gears are shown in figures on the drawing,and it will be noticed that the oscillating motion of thepump piston will be very slow. Owing to the fact that asmall amount of solid matter contained in the oil wouldprove fatal to the successful operation of the engine, acopper gauze strainer is used in the tank and the oil mustpass through this before it reaches the feed pipe at thebottom of the tank. Solid matter is thus prevented fromfouling the engine. The oil pump produces a dischargeof oil in the steam supply pipe from the boiler coils. Thelubricating oil is thus mixed with superheated steam justbefore it enters the cylinder of the engine. The lubri- Flash Steam Plaiits 171 eating oil used should be rather viscid so
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