Piston

Piston is a period-2 oscillator found in 1971.[1] 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.)

Piston
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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

Synthesis

gmc_nxtman found a 6-glider synthesis of the piston on July 26, 2017.[2]

A long piston.
gollark: For example, if someone claims that the mainstream establishment has been suppressing it or something, or if they talk about outlandish things which go against existing better-known science.
gollark: Nope. There are rough heuristics, though.
gollark: It looks vaguely like my bismuth thing in shape, but not color or anything.
gollark: It would be better to teach transferable stuff like "actually reading safety manuals".
gollark: You can't just teach safety of every random technological thing in school.

References
  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. gmc_nxtman (July 26, 2017). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  • 23P2.201 at Heinrich Koenig's Game of Life Object Catalogs
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