Coe ship

Coe ship
14b2o$o7bob4ob2o$o7bo2b5o$8bo3b3o$2bo$2bo$12b4o$11bo3bo$15bo$11bo2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 16 TRACKLOOP 64 1/2 0 THUMBSIZE 2 GPS 4 HEIGHT 400 WIDTH 600 ]]
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Pattern type	Puffer engine Spaceship
Number of cells	28
Bounding box	17 × 12
Frequency class	43.4
Direction	Orthogonal
Period	16 (mod: 16)
Speed	c/2 | 8c/16
Heat	38.0
Kinetic symmetry	Unspecified
Discovered by	Tim Coe
Year of discovery	1995
Rules Outer-totalistic rules B3/S23 – B38/S23 # of rules 21 = 2 Isotropic rules B3-cky/S23-c – B34cekt5ce6ci7e8/S234cey5cek6ei7e
Glider synthesis Fewest gliders 7 Catagolue-generated RLE synthesis Uploaded synthesis RLE coeship_synth.rle
Pattern files Plaintext coeship.cells RLE coeship.rle
Identifiers apgcode xq16_gcbgzvgg826frc Pentadecathlon ID 28P16H8V0.1 Eppstein ID 9153

The Coe ship is the first known period-16 c/2 orthogonal spaceship, discovered by Tim Coe on October 26, 1995. It consists of a lightweight spaceship stabilizing a sparky, modified heavyweight spaceship.

Use as a puffer engine

The Coe ship can be used as a puffer engine because it produces a long back spark, which leads to puffers and rakes, as shown below.

x = 44, y = 21, rule = B3/S23 29b4o$28b6o$28b4ob2o$32b2o4$38b6o$26b2o8b2o5bo$25b3o6b2obo5bo$26b3o9bo 3bo$27bobo10bo$12bobo13bo11b2o$12b2o25b4o$13bo25b2ob2o$41b2o$obo27b6o$ 2o27bo5bo$bo33bo$29bo4bo$31b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 16 TRACKLOOP 64 1/2 0 THUMBSIZE 2 GPS 4 HEIGHT 400 WIDTH 800 ]] Coe ship powering a backward rake (click above to open LifeViewer) RLE: here Plaintext: here

x = 44, y = 24, rule = B3/S23 bo$b2o$obo$29b4o$5bo22b6o$5b2o11b4o6b4ob2o$4bobo10b6o9b2o$17b4ob2o$9bo 11b2o$9b2o$8bobo27b6o$26b2o8b2o5bo$25b3o6b2obo5bo$14b2o10b3o9bo3bo$12b 2o2bo10bobo10bo$12b2ob2o11bo11b2o$13bob2o22b4o$12b2o25b2ob2o$41b2o$18b 2o10b6o$14b4ob2o8bo5bo$14b6o15bo$15b4o10bo4bo$31b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 16 TRACKLOOP 64 1/2 0 THUMBSIZE 2 GPS 4 HEIGHT 400 WIDTH 800 ]] Coe ship powering a forward rake (click above to open LifeViewer) RLE: here Plaintext: here

x = 25, y = 15, rule = B3/S23 13b2o$10b3ob2o$10b5o$11b3o$8bo$7bobo$19b6o$17b2o5bo$15b2obo5bo$2o6b2o 9bo3bo$2o6bo12bo$21b2o$20b4o$20b2ob2o$22b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 16 TRACKLOOP 64 1/2 0 THUMBSIZE 2 GPS 4 HEIGHT 400 WIDTH 800 ]] Coe ship powering a block puffer (click above to open LifeViewer) RLE: here Plaintext: here

Commonness

The Coe ship appeared in an asymmetric soup found by apgsearch in December 2015, making it the first naturally occurring non-period-4 spaceship. A second Coe ship appeared on Catagolue in June 2016, and four more shortly after. Currently it is the 35th most common naturally occurring spaceship, being more common than HWSS on HWSS 8, but less common than MWSS on HWSS 13.

Glider synthesis

Mark Niemiec found a 9-glider synthesis of this spaceship on October 28, 1995. A 7-glider synthesis was discovered by 2718281828 on December 8, 2017.

See also

• 31P8H4V0

External links

• Coe ship at the Life Lexicon

• 28P16H8V0.1 at Heinrich Koenig's Game of Life Object Catalogs

• The Coe Ship (glider 9152) at David Eppstein's Glider Database

• Coe ship at Adam P. Goucher's Catagolue