Glider-producing switch engine

Glider-producing switch engine
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Pattern type	Puffer
Number of cells	123
Bounding box	67×60
Frequency class	21.0
Direction	Diagonal
Period	384
Speed	c/12
Discovered by	Charles Corderman
Year of discovery	1971
Rules Outer-totalistic rules B3/S23 only Important rules Conway Life # of rules 20 = 1 Isotropic rules B3/S23 only
Glider synthesis Fewest gliders 4 Catagolue-generated RLE gliderproducingswitchengine_synth.rle Uploaded synthesis RLE gliderproducingswitchengine_synth.rle
Pattern files Plaintext gliderproducingswitchengine.cells RLE gliderproducingswitchengine.rle
Identifiers apgcode yl384_1_59_7aeb1999980c43b4945fb7fcdb023326

The glider-producing switch engine (or glider-making switch engine) is a puffer that was found by Charles Corderman in the early 1970s. It consists of a switch engine reacting with blocks to produce various still lifes, several blinkers, and a glider every 384 generations.

Because of its easy construction (see its predecessors below), it has appeared in some superlinear growth patterns including mosquito 3.

Commonness

The glider-producing switch engine is the second most common naturally-occurring pattern that exhibits infinite growth, the most common being the block-laying switch engine. It is also the ninety-first most common object on Adam P. Goucher's Catagolue.

Time bomb

The time bomb is a 17-cell pattern found by Douglas G. Petrie that evolves into a glider-producing switch engine.

Synthesis

Although a clean synthesis of the glider-producing switch engine requires 4 gliders, Michael Simkin found a 3-glider collision in October 2014 which includes the puffer in its ash. This collision has the minimum number of gliders necessary to exhibit infinite growth, and is the only known 3-glider collision to do so.

Image gallery

The debris left behind by the glider-producing switch engine

The time bomb RLE: here

Another simple predecessor of the glider-producing switch engine Download RLE: click here

External links

• Stabilized switch engine at the Life Lexicon
• Single switch engine puffer trains at the Life Objects Catalog

• Glider-producing switch engine at Adam P. Goucher's Catagolue (linear growth)