4-engine Cordership

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4-engine Cordership
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Pattern type Spaceship
Family Cordership
Number of cells 134
Bounding box 76×76
Direction Diagonal
Period 96
Mod 96
Speed c/12
Heat 178.0
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 It is the second smallest known Cordership in terms of its minimum population of 134 cells, superseded by the 2-engine Cordership.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]

Image gallery

The 136-cell variant of the 4-engine Cordership.
RLE: here

See also


  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.

External links