Period-90 glider gun

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Period-90 glider gun
x = 64, y = 26, rule = B3/S23 39bo$39bobo$32b2o8b2o6b2o$27bo3bo2bo7b2o4bo3bo$26b8o8b2o3bo5bo$9b2o14b 2obob2o7bobo4b2obo3bo8b2o$9bo2bo11b3obo2bo7bo7bo5bo8b2o$b5o7bo11b2obob o17bo3bo$o5bo6bo12b4o20b2o$o3b2o7bo7bo5bo12bo$bo7bo2bo9bo15b2o$9b2o9b 3o16b2o3$43b2o$43b2o2$29bo$27bobo$28b2o3$40b2o$40bo$41b3o$43bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 WIDTH 640 POPUPWIDTH 640 GPS 15 ZOOM 9 ]]
Pattern type Gun
Number of cells 92
Bounding box 64 × 26
Period 90
Barrels 1
Discovered by Dean Hickerson
Year of discovery Unknown

Period-90 glider gun is a glider gun with true period 90. This one by Dean Hickerson uses the output of two p30 guns in a period-multiplying reaction.

The smallest known such gun (by bounding box) is comprised of a queen bee shuttle and a unix doubling the period of the period-45 glider gun.[1]


x = 33, y = 31, rule = B3/S23 24bo$23b3o$22bobobo$22bobobo$23b3o$7bo6bo9bo$6b2o6b2o$5b3o6b3o$6b2o6b2o8bo$7bo6bo8b3o$22bobobo$2o20bobobo$obo7bobo10b3o$bo4b2o3b3o10bo5b2o$6b5o2bo15bo2bo$8b2o2b2o13bo2bobo$10b2o6b2obo5bo3bo$20b2o5bo$20bo9bo$28b2o2$9b2o$9b2o2$12bo$10b4o$9bobob2o$4b2o2bo2bob3o8b2o6bo$4b2o3bobob2o9b2o4bobo$10b4o17b2o$12bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 WIDTH 500 GPS 15 ZOOM 9 AUTOSTART ]]
The former optimal design, uses one queen bee, a Pentadecathlon, and a jam to filter the stream

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x = 36, y = 27, rule = B3/S23 26b2o$26bobob2o$28bob2o$27b2o$30b2o$24bo6bo$24bo6bobo$23bobo6b2o$22b2o b2o$21bo5bo$8bo4bo10bo$6b2ob4ob2o5b2o3b2o$8bo4bo3$2o27b2o$obo26b2o$bo $29bo$8b2ob2o15bobo$9b3o16bo2bo2b2o$10bo21bob2o$30b2o3$9b2o$9b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 WIDTH 500 GPS 15 ZOOM 9 AUTOSTART ]]
The current optimal design [2]
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References

  1. gun_90 was formerly this gun (apologies for it being period-0 but that is the only way to describe linear growth patterns)
  2. iNoMed (January 9, 2025). Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums