Schick engine: Difference between revisions
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|bx = 20 | |bx = 20 | ||
|by = 11 | |by = 11 | ||
|fc = 48 | |||
|dir = Orthogonal | |dir = Orthogonal | ||
|p = 12 | |p = 12 | ||
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|z = 6c/12 | |z = 6c/12 | ||
|h = 43.2 | |h = 43.2 | ||
|symmetry = -c | |||
|discoverer = Paul Schick | |discoverer = Paul Schick | ||
|discoveryear = 1972 | |discoveryear = 1972 | ||
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|eppsteinid = 13374 | |eppsteinid = 13374 | ||
}} | }} | ||
The '''Schick engine''' (or '''Schick ship''') can refer to one of four {{periodS|12}} [[c/2 orthogonal]] [[spaceship]]s which involve a [[Standard spaceship flotilla#Two standard spaceships|flotilla of two standard spaceships]] pulling a period-12 [[tagalong]]. The term "Schick engine" may alternatively be used to refer to the tagalong alone, separately from the two spaceships supporting it. | The '''Schick engine''' (or '''Schick ship''') can refer to one of four {{periodS|12}} [[c/2 orthogonal]] [[spaceship]]s which involve a [[Standard spaceship flotilla#Two standard spaceships|flotilla of two standard spaceships]] pulling a period-12 [[tagalong]] consisting of a [[bullet heptomino]] and [[sparks]]. The term "Schick engine" may alternatively be used to refer to the tagalong alone, separately from the two spaceships supporting it. | ||
This tagalong was found by [[Paul Schick]] in {{year|1972}}. For about fifty years the 39-cell LWSS-on-LWSS variant of the Schick engine was the smallest known period-12 spaceship in terms of population, until it was displaced by the 35-cell [[35P12H6V0]] in February {{year|2022}}. | This tagalong was found by [[Paul Schick]] in {{year|1972}}. For about fifty years the 39-cell LWSS-on-LWSS variant of the Schick engine was the smallest known period-12 spaceship in terms of population, until it was displaced by the 35-cell [[35P12H6V0]] in February {{year|2022}}. | ||
The four possible spaceship types are displayed below, with the tagalong portion highlighted in green | The four possible spaceship types are displayed [[#Table|in a table below]], with the tagalong portion highlighted in green. | ||
Its eleven-cell rear [[spark]] can be perturbed by other c/2 spaceships to form a variety of [[puffer]]s and thus it is a [[puffer engine]].<ref>{{CiteLifeline|vol=9|pages=page 5}}</ref> | Its eleven-cell rear [[spark]] can be perturbed by other c/2 spaceships to form a variety of [[puffer]]s and thus it is a [[puffer engine]].<ref>{{CiteLifeline|vol=9|pages=page 5}}</ref> | ||
== | == Occurrence == | ||
{{main|List of | {{main|List of natural spaceships}} | ||
A lightweight Schick engine first appeared [[natural]]ly on February 12th, 2019,<ref name="post70479" /> having previously emerged (along with its middleweight and heavyweight variants) from symmetric soups on [[Catagolue]].<ref name="post14978" /><ref name="post17658" /><ref name="post28997" /> A second natural Schick engine appeared in October 2020.<ref name="post105674" /> | A lightweight Schick engine first appeared [[natural]]ly on February 12th, 2019,<ref name="post70479" /> having previously emerged (along with its middleweight and heavyweight variants) from symmetric soups on [[Catagolue]].<ref name="post14978" /><ref name="post17658" /><ref name="post28997" /> A second natural Schick engine appeared in October 2020.<ref name="post105674" /> | ||
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== Glider synthesis == | == Glider synthesis == | ||
An {{gliders|11}} [[Glider synthesis|synthesis]] for the lightweight Schick engine was found by [[Douglas G. Petrie]] in {{year|1973}}.<ref>{{CiteLifeline|vol=11|pages=page 19}}</ref> | An {{gliders|11}} [[Glider synthesis|synthesis]] for the lightweight Schick engine was found by [[Douglas G. Petrie]] in {{year|1973}}.<ref>{{CiteLifeline|vol=11|pages=page 19}}</ref> | ||
== Table == | |||
{{Schick engines table}} | |||
== See also == | == See also == | ||
* [[Big A]] | * [[Big A]] | ||
* [[54P12H6V0]] | |||
* [[Blinker ship 1]] | * [[Blinker ship 1]] | ||
* [[Crown]] | * [[Crown]] | ||
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* {{LinkEppsteinRule|rule=b3s23|rulename=Life (B3/S23)|archivedate=20160309235206}} <!-- The Schick Engine (glider 13374), size 9x15, speed c/2, orthogonal, period 12 --> | * {{LinkEppsteinRule|rule=b3s23|rulename=Life (B3/S23)|archivedate=20160309235206}} <!-- The Schick Engine (glider 13374), size 9x15, speed c/2, orthogonal, period 12 --> | ||
* {{LinkPentadecathlonObject|39P12H6V0.1}} | * {{LinkPentadecathlonObject|39P12H6V0.1}} | ||
* {{cite web | |||
|url = https://web.archive.org/web/20200510052724/http://www.pentadecathlon.com/objects/class4/typeB/TTetromino/TTetromino.php | |||
|title = Puffers | |||
|work = [[Game of Life News|Game of Life Information]], Class 4 Objects Catalog, Type B -- Puffer Trains | |||
}} | |||
[[Category:Smoking ships]] | [[Category:Smoking ships]] | ||
[[Category:Puffer engines]] | [[Category:Puffer engines]] | ||
[[Category:Lists of patterns with synthesis costs]] | |||
{{natural}} | {{natural}} | ||
__NOTOC__ | __NOTOC__ | ||
Latest revision as of 11:31, 26 April 2026
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| Pattern type | Tagalong Spaceship | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 39 | ||||||||
| Bounding box | 20 × 11 | ||||||||
| Frequency class | 48 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 12 (mod: 12) | ||||||||
| Speed | c/2 | 6c/12 | ||||||||
| Heat | 43.2 | ||||||||
| Kinetic symmetry | -c | ||||||||
| Discovered by | Paul Schick | ||||||||
| Year of discovery | 1972 | ||||||||
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The Schick engine (or Schick ship) can refer to one of four period-12 c/2 orthogonal spaceships which involve a flotilla of two standard spaceships pulling a period-12 tagalong consisting of a bullet heptomino and sparks. The term "Schick engine" may alternatively be used to refer to the tagalong alone, separately from the two spaceships supporting it.
This tagalong was found by Paul Schick in 1972. For about fifty years the 39-cell LWSS-on-LWSS variant of the Schick engine was the smallest known period-12 spaceship in terms of population, until it was displaced by the 35-cell 35P12H6V0 in February 2022.
The four possible spaceship types are displayed in a table below, with the tagalong portion highlighted in green.
Its eleven-cell rear spark can be perturbed by other c/2 spaceships to form a variety of puffers and thus it is a puffer engine.[1]
Occurrence
- Main article: List of natural spaceships
A lightweight Schick engine first appeared naturally on February 12th, 2019,[2] having previously emerged (along with its middleweight and heavyweight variants) from symmetric soups on Catagolue.[3][4][5] A second natural Schick engine appeared in October 2020.[6]
Notably, a middleweight Schick engine appeared semi-naturally on February 13th, 2022,[7] in the symmetry C2_2, which is a rotational symmetry and thus would not be predisposed to produce such an object. It has yet to occur naturally.
Glider synthesis
An 11-glider synthesis for the lightweight Schick engine was found by Douglas G. Petrie in 1973.[8]
Table
| Image | Name | Min. population | Supporting flotilla | apgcode | Cost in gliders |
|---|---|---|---|---|---|
|
Lightweight Schick engine | 39 | LWSS on LWSS (pseudo) | xq12_fh1i0i1hfzw8sms8zxfjf | 9 |
|
Middleweight Schick engine | 42 | MWSS on MWSS 1 | xq12_v1120211vz01gpcpg1zxv7vzy01 | 11 |
|
Heavyweight Schick engine | 44 | HWSS on HWSS 1 | xq12_v1120211vz120ioi021zw1vev1zx121 | 12 |
|
Asymmetric Schick engine | 42 | LWSS on HWSS 2 | xq12_xupuzw27d72zu10109ghuz3221 | 11 |
See also
References
- ↑ Robert Wainwright (March 1973). Lifeline, vol 9, page 5.
- ↑ Adam P. Goucher (February 12, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Richard Schank (December 14, 2014). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Richard Schank (March 10, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ gmc_nxtman (March 20, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ bubblegum (October 5, 2020). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ dani (February 13, 2022). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Robert Wainwright (September 1973). Lifeline, vol 11, page 19.
External links
- Schick engine at the Life Lexicon
- Life (B3/S23) at David Eppstein's Glider Database
- 39P12H6V0.1 at Heinrich Koenig's Game of Life Object Catalogs
- "Puffers". Game of Life Information, Class 4 Objects Catalog, Type B -- Puffer Trains.
Categories:
- Patterns
- Patterns with Catagolue frequency class 48
- Natural periodic objects
- Spaceships with 39 cells
- Periodic objects with minimum population 39
- Patterns with 39 cells
- Patterns found by Paul Schick
- Patterns found in 1972
- Patterns that can be constructed with 9 gliders
- Outer-totalistically endemic patterns
- Spaceships
- Tagalongs
- Spaceships with period 12
- Orthogonal spaceships
- Spaceships with speed c/2
- Spaceships with unsimplified speed 6c/12
- Spaceships with heat 43
- Spaceships with mod 12
- Spaceships with -c symmetry
- Smoking ships
- Puffer engines