3-engine Cordership

The 3-engine Cordership is a c/12 diagonal spaceship that was discovered by Paul Tooke on January 12, 2004. Until the 2-engine Cordership was found, it was the Cordership that used the fewest number of known possible switch engines. Despite this, the 4-engine Cordership is smaller in terms of minimum population (the 2-engine Cordership beating both).

3-engine Cordership
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>31b3o24b$32bo25b$32bo2bo22b$32bo2bo22b$33bobo22b$48b2o8b$48b2o8b3$32bo 25b$31bobo24b$32bo25b$49bo8b$48bo7b2o$30b4o22b2o$30b2o3bo10bo11b$31bo 4bo9bobo9b$33bob2o10bo10b$34bo23b3$42bobob2o10b$25bo16bobo13b$24b3o17b o2bo10b$43bo3bo10b$24b3o16b4o2b2o7b$25b2ob2o14bo5b2o6b$27bo21bo8b3$b3o 54b$2bo55b$2bo2bo52b$2bo2bo52b$3bobo52b$18b2o38b$18b2o38b$24bo33b$23b 3o32b$2bo19b2ob2o31b$bobo18bobo33b$2bo19bo35b3$4o54b$2o3bo13bo38b$bo4b o11bobo37b$3bob2o11bo39b$4bo15b2o36b$21bo36b$18b3o37b$19b2o37b$16bo41b $16b2o40b$16b2o40b$6b2o6b2o42b$6b2o4b2o44b$12b2obo42b$14b2o42b5$14b2o 42b$14b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ ZOOM 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 480 WIDTH 480 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type Spaceship
Family Cordership
Number of cells 149
Bounding box 58×65
Direction Diagonal
Period 96
Mod 48
Speed c/12
Speed (unsimplified) 8c/96
Heat 156.1
Discovered by Paul Tooke
Year of discovery 2004

David Bell discovered in 2005 that the 3-engine Cordership can be used to turn a lightweight spaceship 90 degrees as shown below.[1] It could be constructed with 15 gliders, and Tooke created a gun for this spaceship only a week after its original construction (see 3-engine Cordership gun). In March 2017 Luka Okanishi discovered a three-glider synthesis for a switch engine, which reduced the recipe to only 11 gliders.[2]

The 3-engine Cordership can easily be destroyed by three eater 1s and four blocks, as shown below. This cleanup reaction was found by Jason Summers.

Incremental construction

Dave Greene discovered a glider synthesis for upgrading a switch engine to a wing, which can be repeated to form the complete Cordership. Adam P. Goucher then built a Herschel conduit to convert a glider into a 3-engine Cordership.[3]

<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 87, y = 95, rule = B3/S23 46b2o$25bo20b2o$25b3o$28bo$27b2o4$54b2o$54b2o15$18bo$18b3o$21bo$20b2o 3$60b3o$61bo$61bo2bo$b2o58bo2bo$2bo59bobo$2bobo72b2o$3b2o72b2o3$61bo$ 60bobo$61bo$78bo$77bo7b2o$59b4o22b2o$59b2o3bo10bo$60bo4bo9bobo$62bob2o 10bo$63bo3$71bobob2o$54bo16bobo$53b3o17bo2bo$2o70bo3bo$2o51b3o16b4o2b 2o$54b2ob2o14bo5b2o$56bo21bo3$30b3o$31bo$8b2o21bo2bo$8b2o21bo2bo$32bob o$47b2o$47b2o$53bo$52b3o$31bo19b2ob2o$30bobo18bobo$31bo19bo3$29b4o$29b 2o3bo13bo$30bo4bo11bobo$32bob2o11bo$33bo15b2o$50bo$47b3o$48b2o$45bo$ 45b2o$45b2o$35b2o6b2o$35b2o4b2o$41b2obo$43b2o5$43b2o$43b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] [[ ZOOM 5 HEIGHT 480 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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3-engine Cordership eater using eater 1s and blocks
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RLE: here Plaintext: here
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 63, y = 68, rule = B3/S23 36b3o$37bo$37bo2bo$37bo2bo$38bobo$53b2o$53b2o3$37bo$36bobo$37bo$54bo$ 53bo7b2o$35b4o22b2o$35b2o3bo10bo$36bo4bo9bobo$38bob2o10bo$39bo3$47bobo b2o$30bo16bobo$29b3o17bo2bo$48bo3bo$29b3o16b4o2b2o$30b2ob2o14bo5b2o$ 32bo21bo3$6b3o$7bo$7bo2bo$7bo2bo$8bobo$23b2o$23b2o$29bo$28b3o$7bo19b2o b2o$6bobo18bobo$7bo19bo3$5b4o$5b2o3bo13bo$6bo4bo11bobo$8bob2o11bo$9bo 15b2o$26bo$23b3o$24b2o$21bo$21b2o$21b2o$11b2o6b2o$11b2o4b2o$17b2obo$ 19b2o5$19b2o$b2o16b2o$4o$2ob2o$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] [[ ZOOM 6 HEIGHT 480 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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3-engine Cordership about to reflect a lightweight spaceship by 90 degrees
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RLE: here Plaintext: here
gollark: Don't worry, just join late and... er, say it's traffic.
gollark: COOL people use an all-flash setup with no foolish HDDs.
gollark: Except incompatible ones!
gollark: Let no mods escape installation\!
gollark: MOAR! MOAR!

See also

References
  1. "New Compact Corderships". Dave Greene (June 18, 2005). Retrieved on June 10, 2009.
  2. "Re: Thread For Your Accidental Discoveries". Luka Okanishi (March 12, 2017). Retrieved on March 13, 2017.
  3. "First complete glider-to-Cordership converter". Dave Greene (February 7, 2009). Retrieved on June 15, 2009.
  • 149P96H8V8.1 at Heinrich Koenig's Game of Life Object Catalogs
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