Piston

Piston
2o7b2o$obo2bo2bobo$2b4o2bo2b$obo2bo2bobo$2o7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
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Pattern type	Oscillator
Number of cells	23
Bounding box	11×5
Frequency class	38.9
Period	2
Mod	1
Heat	4
Volatility	0.16
Strict volatility	0.16
Rotor type	Orthogonal on-off
Discovered by	Unknown
Year of discovery	1971
Rules Outer-totalistic rules B3/S23 – B3678/S01235678 Important rules Conway Life, HighLife # of rules 29 = 512 Isotropic rules B3i/S2-cn3enq – B2kn34-a5-eq678/S01234-t5678
Glider synthesis Fewest gliders 6 Catagolue-generated RLE piston_synth.rle Uploaded synthesis RLE piston_synth.rle
Pattern files Plaintext piston.cells RLE piston.rle
Identifiers apgcode xp2_rhe44ewehr Pentadecathlon ID 23P2.201

Piston is a period-2 oscillator found in 1971. Its usage is similar to that of the spark coil. It can be extended indefinitely along its axis, with varying degrees of dihedral symmetry according to its parity. (Its rotors are used in an agar shown at Agar#Tile_agars.)

Synthesis

gmc_nxtman found a 6-glider synthesis of the piston on July 26, 2017.

Image gallery

A long piston.

External links

• Piston at the Life Lexicon

• Piston at Adam P. Goucher's Catagolue

• Long piston at Adam P. Goucher's Catagolue

• 23P2.201 at Heinrich Koenig's Game of Life Object Catalogs