|View static image|
|Number of cells||134|
|Discovered by||David Bell|
|Year of discovery||2005|
The 4-engine Cordership is a c/12 diagonal spaceship that was discovered by David Bell on July 9, 2005. It is composed of four switch engines. It is the second smallest known Cordership in terms of its minimum population of 134 cells, superseded by the 2-engine Cordership.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.
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. The front and back halves of the Cordership can be produced by identical glider constructions. These features were used to construct the infinite Corderships gun.
|Two versions of Michael Simkin's extensible 4-engine Cordership|
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