Period-44 glider gun

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Period-44 glider gun
x = 44, y = 41, rule = B3/S23 17b2o6b2o$17b2o6b2o7$b2o38b2o$obo38bobo$obob2o32b2obobo$bobobo32bobobo $3bo36bo$2bo2bo13bo4bo13bo2bo$2bo15b2o4b2o15bo$2bo3bo10bo8bo10bo3bo$2b o3bo11b2o4b2o11bo3bo$2bo16bo4bo16bo$2bo2bo32bo2bo$3bo36bo$bobobo32bobo bo$obob2o32b2obobo$obo38bobo$b2o38b2o4$15b2o$16bo$13b3o$13bo20b2o$18b 2o14bobo$18b2o16bo$36b2o4$20b2o$19bobo$19bo$18b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 GPS 15 HEIGHT 480 ZOOM 10 ]]
View static image
Pattern type Gun
Number of cells 140
Bounding box 44 × 41
Period 44
Barrels 1
Discovered by David Buckingham
Paul Callahan
Year of discovery 1997

Period-44 glider gun is a glider gun with a true period of 44. The first one was found by Dave Buckingham on April 2, 1992. It used two interacting copies of p44 pi-heptomino hassler, which he had also found. In October 1996 he found a variant of the gun which only used one copy of the oscillator.[1] Paul Callahan improved it in February 1997, resulting in the gun shown in the infobox.[2] It can be converted to a double-barrelled form by making the top half of the gun a mirror-image or rotated copy of the bottom half.

x = 39, y = 29, rule = B3/S23 9b2o3b2o3bo$9bo4bo4b3o$11bo3bo6bo$10b2o2b2o5b2o11bo$8bo2bobo15b3ob2o2b2o$8b2o3bo15b4o4b2o$12bo20b2o$12b2o$7bo$6bobo$2o3b3o$o2b3o12bo4bo$b2obo12b2o4b2o$2bo13bo8bo$2bobo12b2o4b2o$3b3o12bo4bo10b2o$5b3o26b2o$6bobo$7bo25bob3o$12b2o19b2o3bo$12bo23b2o$8b2o3bo18bob2o$8bo2bobo18b2obo$10b2o2b2o$11bo3bo$9bo4bo$9b2o3b2o4bo9bo$19bobo6bobo$20bo8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 AUTOSTART GPS 12 ZOOM 12 HEIGHT 600 WIDTH 600 ]]
A variant with a highly optimized (39*29) bounding box, currently the smallest known (pseudo) period-44 glider gun.
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x = 40, y = 32, rule = B3/S23 20bo3b2o3b2o$18b3o4bo4bo$17bo6bo3bo$5b2o10b2o5b2o2b2o$b4o4b2o15bobo2bo$b3ob2o2b2o15bo3b2o$6bo20bo$26b2o$10bo21bo$10b2o19bobo$10b2o20b3o3b2o$16bo4bo12b3o2bo$15b2o4b2o12bob2o$2o12bo8bo13bo$o14b2o4b2o12bobo$2bob2o10bo4bo12b3o$b2ob2o26b3o$31bobo$b2ob2o26bo$b2obo5b2o$4bo5bo24b2o$4bob2o3bo23b2o$5b2o2bobo$8b2o2b2o$9bo3bo20bob2o$7bo4bo21bobo$7b2o3b2o4bo9bo6bo$17bobo6bobo6b2o$16bobo8b2o6b2o$16bo18b2o$13b2obo$13b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 AUTOSTART GPS 12 ZOOM 12 HEIGHT 600 WIDTH 600 ]]
A 40*32 p88 variant using a blocker as a period-doubling mechanism.
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x = 37, y = 32, rule = B3/S23 13b2o8b2o$9bobo2bo8bo2bobo$7b3ob2o12b2ob3o$6bo24bo$7b3ob2o12b2ob3o$9b ob2o12b2obo9$15b2o4b2o$14bobo4bobo$2o12bo8bo$o13bobo4bobo$2bob2o9b2o4b 2o9b2o$b2ob2o26b2o2$b2ob2o25bob3o$b2obo5b2o19b2o3bo$4bo5bo23b2o$4bob2o 3bo18bob2o$3b2obo2bobo18b2obo$8b2o2b2o$9bo3bo$7bo4bo$7b2o3b2o4bo9bo$17b obo9bo$18bo8b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 AUTOSTART GPS 12 ZOOM 12 HEIGHT 600 WIDTH 600 ]]
The current smallest true period-44 glider gun (37*32, a mere 5 cells smaller than 41*29).
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x = 40, y = 43, rule = B3/S23 b2o18bo3b2o3b2o$b2o16b3o4bo4bo$3b3o12bo6bo3bo$3bo14b2o5b2o2b2o5b2o$b3o23bobo2bo3bo2bo$b2o24bo3b2o5b2o$bo26bo8b3o$2bo5b2o17b2o8bo$8b2o25b2o$b2o$36b2o$b3o13bo4bo4b2o$3o13b2o4b2o5bo7bo$15bo8bo$2o8bo5b2o4b2o13b3o$11b2o4bo4bo13b3o$bo$37b2o$b3o26b2o$3o27b2o5bo$7bo30bo$2o6b2o27b2o$6b2o28b3o$bo6bo27bo$34b3o$b3o21b2o10b2o$2b3o20bo11b2o$26b3o$2bo25bo$13b3o$b2o10b3o$14bo$2o16b2o$2bo12b2o2bo$2b3o11b3o$3b2o12bo$bo2bo20bo$b2o23b2o$24b2o$13b2o11bo$12bobo$12bo$11b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 AUTOSTART GPS 12 ZOOM 12 HEIGHT 600 WIDTH 600 ]]
A conduit-based p132 variant.
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References

  1. ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. ↑ Jason Summers' jslife pattern collection. Retrieved on October 28, 2020.
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