31c/240 Herschel-pair climber

The 31c/240 Herschel-pair climber (or 31c/240 reaction) is the mechanism defining the rate of travel of the Centipede and shield bug spaceships. It consists of a pair of Herschels climbing two parallel chains of blocks. Certain spacings between the block chains allow gliders from each Herschel to delete the extra ash objects produced by the other Herschel. Two more gliders escape, one to each side, leaving only an exact copy of the original block chains, but shifted forward by 9 cells.

31c/240 Herschel-pair climber
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 66, y = 148, rule = B3/S23 5b2o57b2o$5b2o57b2o30$5b2o57b2o$5b2o57b2o30$5b2o57b2o$5b2o57b2o18$60b 3o$60bo2bo$60bo2bo$59b4o$12b3o44b2o$13bo44bo$11b3o45bo$59bo8$3b2o$3b2o 8b2o41b2o$13b2o41b2o5$2bo$bobo$o3bo$o3bo$4bo$b3o7$5b2o57b2o$5b2o57b2o 12$13b2o41b2o$13b2o41b2o17$5b2o57b2o$5b2o57b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ AUTOSTART GPS 60 X 0 Y 40 TRACKLOOP 240 0/240 -31/240 THUMBSIZE 2 ZOOM 4 HEIGHT 480 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
Pattern type Crawler
Speed 31c/240
Direction Orthogonal
Crawls on Block
Discovered by Unknown
Year of discovery Unknown

Also see

gollark: (not mine)
gollark: https://dragcave.net/lineage/DOOM
gollark: I can think of a few things:* some breeds are snapped up by faster people, or collectors - maybe these have different naming preferences to most?* some of mine have weirder names than others
gollark: Interestingly, some of my dragons have many named offspring, others very few.
gollark: The trick to avoiding the pain is to never hunt again!
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