4-engine Cordership

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4-engine Cordership
46bo29b$46bo29b$48bo5bo21b$47bo6bobo19b$46bo3bo2bo22b$47bo2bobob2o20b$ 52bob2o20b$66b2o8b$66b2o8b7$74b2o$74b2o$55b2o3bo15b$53b3o4b2o14b$48b3o bo8b2o13b$52bobo2b5o14b$53bo3b3o16b3$40bo35b$40bo7bo27b$40bo5b3o27b$ 39b2o3bobo29b$45bo2bo27b$44bo2b2o27b10$27bo48b$24b4o48b4$27bobo46b$28b o47b$2o2bo21b2o48b$3bobo20bo2bo46b$2bo16bo5b2ob2o46b$19bo56b$4b2o13bo 56b2$5b2o12b2o55b$4bo13bo2bo54b$2b2ob2o11bobo55b$5b2o10b2o57b$3bo13bo 58b$20b2o54b$20b2o54b$20b2o54b$17b2obo55b$18b3o55b$19bo56b4$7b2o67b$7b 2o67b7$15b2o59b$15b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 480 WIDTH 480 ]]
View static image
Pattern type Spaceship
Family Cordership
Number of cells 134
Bounding box 76 × 76
Direction Diagonal
Period 96 (mod: 96)
Speed c/12 | Unknown
Heat 178.0
Kinetic symmetry Unspecified
Discovered by David Bell
Year of discovery 2005

The 4-engine Cordership is a diagonal c/12 spaceship that was discovered by David Bell on July 9, 2005. It is the second smallest known Cordership in terms of its minimum population of 134 cells, superseded by the 2-engine Cordership. David Bell used this spaceship to create a small sawtooth, sawtooth 260.[1]

A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed below.

In November 2014 Michael Simkin discovered an alternate 4-engine Cordership, with temporally independent front and back halves -- the last two switch engines can be delayed by any number of ticks relative to the front.[2]

#N extensible 4-engine Cordership #O Michael Simkin, 5 November 2014 #C http://www.conwaylife.com/forums/viewtopic.php?p=14135#p14135 x = 302, y = 137, rule = B3/S23 28bo$27bobo$26b2ob2o$3b3o20b2ob2o123bo$2bo3bo18b3o125bobo$bo4bo18b3o3b o12b2o106b2ob2o$o3bo20b3o4bo11b2o83b3o20b2ob2o$o2bob3o18b2o5bo94bo3bo 18b3o$o7bo17b3o98bo4bo18b3o3bo12b2o$2bo3bobo18b2o97bo3bo20b3o4bo11b2o$ 2bo3bob2o18b2o96bo2bob3o18b2o5bo$4b3ob2o33b2o81bo7bo17b3o$20b2o106bo3b obo18b2o$20b2o6bo14b3o6b2o74bo3bob2o18b2o$27b3o13bobo6b2o76b3ob2o33b2o $26bo3bo115b2o$4b2o24b2o13bo100b2o6bo14b3o6b2o$4b2o23b2o13b2o107b3o13b obo6b2o$5bo38b2o106bo3bo$130b2o24b2o13bo$5bo22b2o13b2o85b2o23b2o13b2o$ 28b2o13b3o85bo38b2o$41b3o$3bo5b3o21b3o5bo89bo22b2o13b2o$3bo7bo142b2o 13b3o$3bo5bobo10b2o16b3o124b3o$9b2o10bo2bo15bo88bo5b3o21b3o5bo$20bo3bo 15b3o86bo7bo$22b2o35b2o68bo5bobo10b2o16b3o$59b2o74b2o10bo2bo15bo$16bo 129bo3bo15b3o$14b2o132b2o35b2o$8b2o2b2o5bo165b2o$8b2o4b2o126bo$18bo 121b2o$15b4o115b2o2b2o5bo$14bobo50b2o65b2o4b2o$13bo2b2obo47b2o75bo$14b o4bo121b4o$15bo124bobo50b2o$16bo2bo119bo2b2obo47b2o$16b2o122bo4bo$141b o$142bo2bo$75b2o65b2o$75b2o2$201b2o$201b2o4$83b2o$83b2o2$209b2o$209b2o 4$91b2o$91b2o2$217b2o$217b2o2$268bo$267bobo$99b2o165bo3bo$99b2o166bobo $268bo14b3o$225b2o55bo3bo$225b2o41b4o10b3o2bo$267bo4bo9bo3bo$269bo13b 3o$266bo3bo2bo9b2o7b2o$107b2o157bob3obo19b2o$107b2o158b3obo2$233b2o$ 233b2o50bo$282b5o$281bo$297bo$115b2o165bo3bo9bob2o$115b2o166b3o12b3o$ 289b2o4b3o3bo$241b2o29b2o14bo2bo4b5o$241b2o29b2o13bo5bo5bo$286bo2b2o$ 285b2ob2ob3o$114b3o142b3o15b2o6bo2bo$113bo3bo5b2o133bo17b4o5bob2o$112b o4bo5b2o132bo4b2o11bo4bo5b2o$111bo3bo140bo3bo9bobobo2bo2b2o$111bo2bob 3o130b2o5bo2bo4bo4bo2bobo4b2o$111bo7bo129b2o5bo3bo3bo3bo4bo3b3o$113bo 3bobo137b2obob3o4bo4b2obo$113bo3bob2o139bo11bo$115b3ob2o140b4o6b2o$ 263b2o$88bo6b2o185b3o$87bobo3bo3bo$86bo3bobo3b2o18bo140b2o$87bobo2bobo b2o17bobo139b2o$88bo3bo2b2o17bo$92bo4bo21bo$93bo2bo10b2o5b2o2b2o$95bo 11b2o7bo$114b2obo$113bo3bo$112bo$111b2obob2o$111b2o3bo$112bo2b2o$113b 3o$102bo11bo$91b3o7bo2bo16bo$90bobob2o5bo3bo15bo$90bobob2o5bo3bo15bo$ 90bo3bo5b2o3bo4b3o$91bobo7bo2bo4b2o2bo$92bo15bo3b2o$107bo2b3o$106bo2b 2o$106bo2bo$107bo2bo$95b2o13bo$95b2o11bobo2$106bo$104bob2o$103bo2b2o$ 104b2obo$104b2ob2o$105bobo$106bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 15 Y -10 Z 2.5 THUMBLAUNCH THUMBSIZE 2 THEME 6 WIDTH 800 HEIGHT 400 POPUPWIDTH 800 POPUPHEIGHT 400 TRACKLOOP 96 -1/12 -1/12 ]]
Two versions of Michael Simkin's extensible 4-engine Cordership

(click above to open LifeViewer)
RLE: here Plaintext: here
The 136-cell variant of the 4-engine Cordership.
RLE: here

See also

References

  1. ↑ Dave Greene (August 10, 2005). "New Sawtooth Patterns". Retrieved on April 21, 2017.
  2. ↑ Michael Simkin (November 5, 2014). "Four engine extendable Cordership". Retrieved on April 21, 2017.
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