The Coe ship is the first period-16 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 non-period-4 spaceship to occur in Life out of an asymmetric random starting pattern. 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.
The Coe ship can be used in various ways to create puffers and rakes.
Coe ship powering a backward rake
Coe ship powering a forward rake
Coe ship powering a block
- ↑ https://catagolue.appspot.com/census/b3s23/C1/xq16
- ↑ http://entropymine.com/jason/life/#collections (jslife/c2-extended/c2-0016.lif)