Coe ship
Coe ship  
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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  
Speed (unsimplified)  8c/16  
Heat  38.0  
Discovered by  Tim Coe  
Year of discovery  1995  
 
 
 

The Coe ship is the first period16 c/2 orthogonal spaceship to be discovered; by Tim Coe in October 1995. It works as a puffer engine because it produces a long spark behind it as it moves. It consists of a lightweight spaceship pulling a heavyweight spaceship that is modified to give the big tail spark.
If nontrivial flotillae are not counted, then Coe ship is the fifth most common naturally occurring spaceship, appearing once per 171,000,000 heavyweight spaceships.
Despite its small size, it never appeared in a soup until 2015 when apgsearch was devised. By doing so, it became the first naturally occurring nonperiod4 spaceship to occur in Life out of an asymmetric random starting pattern.^{[1]} A second Coe ship appeared in June 2016, and three more shortly after. However, the Schick engines and the copperhead have appeared in symmetric soups.
Gallery
The Coe ship can be used in various ways to create puffers and rakes.^{[2]}
See also
References
 ↑ Adam P. Goucher. "Census". Catagolue. Retrieved on March 3, 2016.
 ↑ Jason Summers' pattern collections. Retrieved on March 24, 2016.
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
 Patterns
 Patterns with Catagolue frequency class 43.4
 Patterns with 28 cells
 Patterns found by Tim Coe
 Patterns found in 1995
 Patterns that can be constructed with 8 gliders
 Spaceships
 Puffer engines
 Periodic objects with minimum population 28
 Spaceships with period 16
 Orthogonal spaceships
 Spaceships with speed c/2
 Spaceships with unsimplified speed 8c/16
 Spaceships with heat 38
 Spaceships with mod 16
 Smoking ships