. Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional . c ^?^ vO t 1 « w ^ 2 1< p X fe s CM ^ 192 Model Engineering screwed connection for the purpose of connecting it tothe hollow crankshaft of the engine. Water is supplied to the boiler at the big end of thecoils from a force feed pump, which is driven by theengine through a train of gears, giving a reduction of5 to 1. As shown in Fig. 128, the crank pin may be set atvarious radii, thereby altering the stroke; , the amountof water pumped to the
. Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional . c ^?^ vO t 1 « w ^ 2 1< p X fe s CM ^ 192 Model Engineering screwed connection for the purpose of connecting it tothe hollow crankshaft of the engine. Water is supplied to the boiler at the big end of thecoils from a force feed pump, which is driven by theengine through a train of gears, giving a reduction of5 to 1. As shown in Fig. 128, the crank pin may be set atvarious radii, thereby altering the stroke; , the amountof water pumped to the boiler. A very rigid and light. Fig. 128—How the pump is geared to the engine frame was constructed of umbrella ribbing for the pumpsupport and its gearing. The pump piston and cylinderare made of brass, the former being about % inch indiameter and is fitted with two packing rings. Bronzeballs are used in the check valves to prevent corrosionand sticking. A good seating for these valves is obtainedby placing a steel ball of the same diameter on the seatand tapping it lightly Avith a hammer. To limit the move-ment of the balls, a brass pin is sweated in the side of the Steam Plant for Small Model Airplanes 193 valve housing whicli projects into the water passage ata point slightly above the balls. The fuel container is made in a strealn line formusing brass foil .007 of an inch in thickness. There aretwo compartments, one of which contains 2 ounces ofgasolene, the other 4 ounces of water. Allowance is madein the gasolene reservoir for a small air space, so that aslight air pressure might be generated by means of ah
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Keywords: ., bookcentury1900, bookdecade1910, bookidmodelmakingi, bookyear1919
