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| <noinclude>{{Snippet}}</noinclude>[[Image:Switchengine.png|left]]A '''switch engine''' is a [[methuselah]] that was found by [[Charles Corderman]] in [[:Category:Patterns found in 1971|1971]]. It is unstable by itself, but it can be used to make [[:Category:Spaceships with speed c/12|c/12]] diagonal [[puffer]]s and [[spaceship]]s.
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| There are two basic types of stabilized switch engine, both of which were also found by Charles Corderman: the [[period]] 288 [[block-laying switch engine]] (the more common of the two) and period 384 [[glider-producing switch engine]]. These two puffers are the most natural [[infinite growth]] patterns in [[Conway's Game of Life|Life]], being the only ones ever seen to occur from [[soup|random starting patterns]].
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