Download e-book for kindle: Air Engines by Theodor Finkelstein

By Theodor Finkelstein

ISBN-10: 1860583385

ISBN-13: 9781860583384

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13 an engine built in 1908 is shown driving an attached pump by means of a chain sprocket, and Fig. 14 shows an example of a twocycle engine, made simply by duplicating the components on a single crankshaft. This last construction dates from 1915 and it is surprising to find that nearly 100 years after Stirling’s invention, engines as primitive as that should still be marketed for industrial applications. Most of these engines were built for export to countries such as South America, Africa, and the Far East.

Mechanical work is then delivered to the crankshaft on the outstroke of the power piston by virtue of the expansion of the hot air. During this outstroke of the power piston the feed piston is travelling to the right as well, approaching the power piston continually, so that further quantities of cold air are made available for heating. It should be noted that though this engine is not provided with a proper regenerator, some of its components function in a way resembling the operation of a regenerator by abstracting heat from the hot exhaust gases and storing it until this heat is transferred to a new charge taken in.

Air engines E 9 A D P F Fig. 2a A ‘gradual combustion engine’ with double-acting piston and integral furnace and cylinder assembly. Built in 1880 and used for water pumping. After Kennedy (1904–5) Fig. 2b A Buckett ‘furnace gas engine’ with separate cylinder assembly and furnace. This engine achieved considerable popularity between 1875 and 1885. After Donkin (1911) 10 Air Engines stroke, E closes and D is opened, and as the piston starts on its return stroke some of the fresh air comes into contact with the coal in the grate F, so that heat is imparted to it, which raises the pressure.

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Air Engines by Theodor Finkelstein

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