Period-40 glider gun

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Period-40 glider gun
Period-40 glider gun image
Pattern type Gun
Number of cells 2416
Bounding box 226×220
Period 40
Barrels 1
Discovered by Adam P. Goucher
Matthias Merzenich
Jason Summers
Year of discovery 2013

Period-40 glider gun is an extensible true period-40 glider gun discovered by Adam P. Goucher in 2013 and improved by Matthias Merzenich[1]. It is based on a glider-releasing wick found by Jason Summers and Matthias Merzenich. It can be made to have more than 1 barrel.

A chain of honey farm precursors is hassled by figure eights and period-5 oscillators to produce 11 streams of gliders. One stream is the output, 4 are reflected to stabilize the ends of the honey farm chain, and the other 6 are absorbed by eater 1s.

A smaller version of the gun with a 165×136 bounding box was found by Luka Okanishi in April 2018[2].

The unrelated mechanism of using a blocker to filter the output of the period-20 glider gun yields a much smaller true period-40 gun, so this wick-based gun is of interest mainly for historical reasons.

Image gallery

Animation of period-40 gun


  1. Matthias Merzenich (March 19, 2013). "p40 gun". Retrieved on March 17, 2015.
  2. Luka Okanishi (April 6, 2018). "Re: Construction practice". Retrieved on April 6, 2018.