By T. Finlekstein, A. Organ
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Extra resources for Air Engines - The History, Science, and Reality of the Perfect Engine
2. On the right, an 22 Air Engines Fig. 1 Reproduction of drawing showing the first Stirling engine from the patent specification of 1816 (London version). The engine used in 1818 for pumping water from a quarry (Anon. 1917a) is widely supposed to have looked like this a r to ra at e e n h ge ng Re tori s du H rin ea g t re co je m ct pr ed es si on t. C ns Co on te . ol st m v p. p . c pV = Const. b d C on te m p. t. ns st Co . H du ea rin t a g bs ex o pa rbe ns d io n b . ol v d a or at at er he n ge up Re ing v gi V c Fig.
Valves D and E were operated by linkwork which is not shown. Valve D served to admit the hot combustion gases to the cylinder, while E was the exhaust valve. When the piston moves from right to left, D closes and E opens, so that the gases present to the left of the piston are expelled. The pressure to the right of the piston and in the grate drops below atmospheric pressure due to the increase in volume, so that A opens and the space to the right of the piston is filled with fresh air from the atmosphere.
Thus, Stirling’s invention of the regenerator was made nearly half a century before a proper understanding of its functioning became general. The first recognition of Stirling’s genius in inventing the regenerator so many years in advance of any scientific knowledge of the subject came from Professor Fleeming Jenkin, who said (1883–84): ‘ . . ’ After this discussion of regenerators, which has been necessary for putting the whole subject of air engines in its proper perspective, the design of individual engines that were in common use at one time can be explained.