Difference between revisions of "4-engine Cordership"
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The '''4-engine Cordership''' is a diagonal [[:Category:Spaceships with speed c/12|c/12]] [[spaceship]] that was discovered by [[:Category:Patterns found by David Bell|David Bell]] on July 9, [[:Category:Patterns found in 2005|2005]]. It is the second smallest known [[Cordership]] in terms of its minimum population of 134 [[cell]]s, superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{cite web|url=http://pentadecathlon.com/lifeNews/2005/08/new_sawtooth_patterns.html|title=New Sawtooth Patterns|author=Dave Greene|date=August 10, 2005 |accessdate=April 21, 2017}}</ref> | The '''4-engine Cordership''' is a diagonal [[:Category:Spaceships with speed c/12|c/12]] [[spaceship]] that was discovered by [[:Category:Patterns found by David Bell|David Bell]] on July 9, [[:Category:Patterns found in 2005|2005]] It is composed of four [[switch engine]]s.. It is the second smallest known [[Cordership]] in terms of its minimum population of 134 [[cell]]s, superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{cite web|url=http://pentadecathlon.com/lifeNews/2005/08/new_sawtooth_patterns.html|title=New Sawtooth Patterns|author=Dave Greene|date=August 10, 2005 |accessdate=April 21, 2017}}</ref> | ||
A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed below. | A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed below. | ||
Revision as of 09:34, 6 October 2019
| 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 | 8c/96 | ||||||||
| Heat | 178.0 | ||||||||
| Discovered by | David Bell | ||||||||
| Year of discovery | 2005 | ||||||||
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The 4-engine Cordership is a diagonal c/12 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.[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] 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.[3]
| Two versions of Michael Simkin's extensible 4-engine Cordership (click above to open LifeViewer) RLE: here Plaintext: here |
Image gallery
See also
References
- ↑ Dave Greene (August 10, 2005). "New Sawtooth Patterns". Retrieved on April 21, 2017.
- ↑ Michael Simkin (November 5, 2014). "Four engine extendable Cordership". Retrieved on April 21, 2017.
- ↑ Adam P. Goucher (January 22, 2018). "Re: Stable signal converters". Retrieved on September 15, 201.
External links
- 4-engine Cordership at Adam P. Goucher's Catagolue (extended)
Categories:
- Patterns
- Spaceships with between 130 and 139 cells
- Periodic objects with minimum population between 130 and 139
- Patterns with between 130 and 139 cells
- Patterns found by David Bell
- Patterns found in 2005
- Patterns that can be constructed with 14 gliders
- Outer-totalistically endemic patterns
- Isotropically endemic patterns
- Spaceships
- Spaceships with period 96
- Diagonal spaceships
- Spaceships with speed c/12
- Spaceships with unsimplified speed 8c/96
- Spaceships with heat between 170 and 179
- Cordership variants
- Spaceships with mod 96
- Patterns with bilateral diagonal symmetry