Difference between revisions of "Overweight spaceship"

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{{Pattern|name=Overweight Spaceship|pname=owss|bx=8|by=5|c=15|discoverer=John Conway|discoveryear=1970|life105=true|life106=true|plaintext=true|rle=true}}
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{{Pattern
An '''overweight spaceship''' (or '''OWSS''' for short) is a would-be [[spaceship]] similar to the [[lightweight spaceship]], [[middleweight spaceship]] and [[heavyweight spaceship]], but longer. On its own an overweight spaceship is unstable because the three [[cell]]s at its top do not die off like the corresponding [[spark]]s at the top of the smaller spaceships. Nonetheless, it can be escorted by true spaceships to form a [[Types_of_spaceships#Flotilla|flotilla]].
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|name         = Overweight spaceship
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|pname       = owss
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|c            = 15
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|bx           = 8
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|by           = 5
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|discoverer   = John Conway
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|discoveryear = 1970
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|plaintext    = true
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|rle          = true
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|synthesis    = 13
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|synthesisRLE = true
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}}
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An '''overweight spaceship''' (or '''OWSS''' for short) is a would-be [[spaceship]] similar to the [[lightweight spaceship]], [[middleweight spaceship]] and [[heavyweight spaceship]], but longer. On its own an overweight spaceship is unstable. For example, in the shortest overweight spaceship, the three [[cell]]s at its top do not die off like the corresponding [[spark]]s at the top of the smaller spaceships. Nonetheless, it can be escorted by true spaceships to form a [[Types_of_spaceships#Flotilla|flotilla]].
  
For OWSS with top spark over 4, minimal escort size difference is 4 - as shown below (no screenshot or RLE for now, for technical reasons)
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[[Image:overweight_with_escort.png|left|x125px|thumb|Overweight Spaceship with escort]] For OWSS with top spark over 4, minimal escort size difference is 4, as shown.
  
<code>
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==Meta-flotillas==
☺ - dead, - alive
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It is also possible to stabilize the OWSS with more OWSSes, which then have to be stabilized by more [[xWSS]]es. An example is shown below.
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[[Image:OWSS-F3.png|center|x250px|thumb|Overweight spaceship supported by more overweight spaceships.]]
  
☺☺☻☻☻☻☺☺☺
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==Glider synthesis==
☺☺☻☺☺☺☻☺☺
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Many lengths of overweight spaceship can be constructed by [[glider synthesis|colliding gliders]].<ref name="post77160" />  Recent syntheses are collected in the <tt>xq4</tt> synthesis listing in [[Catagolue]]<ref>{{cite web|url=https://catagolue.appspot.com/census/b3s23/synthesis-costs/xq4|title=xq4 census|work=Catagolue|accessdate=October 28, 2019}}</ref>; a number of older recipes can be found in [[Mark Niemiec]]'s synthesis database.<ref>{{cite web|url=https://conwaylife.com/ref/mniemiec/flotilla.htm#ss-owss|title=Overweight spaceship flotillae|work=Mark Niemiec's database|author=Mark Niemiec|accessdate=October 28, 2019}}</ref>
☺☺☻☺☺☺☺☺☺
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☺☺☺☻☺☺☻☺☺
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==In other rules==
☺☺☺☺☺☺☺☺☺
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The [[non-totalistic Life-like cellular automaton|non-totalistic]] rule [[FattyLife]] (B3-n4nt5qr6i/S23) is specifically tailored to support the overweight spaceship with spark length 3, making it [https://catagolue.appspot.com/object/xq8_27deeee6/b3-n4nt5qr6is23 a p8 spaceship.]
☺☻☺☺☺☺☺☺☻
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☻☺☺☺☺☺☺☺☺
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==References==
☻☺☺☺☺☺☺☺☻
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<references>
☻☻☻☻☻☻☻☻☺
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<ref name="post77160">{{LinkForumThread
☺☺☺☺☺☺☺☺☺
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|format = ref
☺☺☺☺☺☺☺☺☺
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|title  = Re: Small Spaceship Syntheses
☺☺☺☺☺☺☺☺☺
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|p      = 77160
☺☺☻☻☻☻☺☺☺
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|author = Martin Grant
☺☺☻☺☺☺☻☺☺
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|date  = June 5, 2019
☺☺☻☺☺☺☺☺☺
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}}</ref>
☺☺☺☻☺☺☻☺☺
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</references>
</code>
 
  
 
==External links==
 
==External links==
*[http://www.argentum.freeserve.co.uk/lex_o.htm#owss Overweight spaceship] at the Life Lexicon
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{{LinkLexicon|lex_o.htm#owss}}
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[[Category:XWSS variants]]
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__NOTOC__

Latest revision as of 19:20, 28 October 2019

Overweight spaceship
4o$o3bo$o$bo2bo$5bo$bo5bo$o$o6bo$7o4$4o$o3bo$o$bo2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Pattern type Miscellaneous
Number of cells 15
Bounding box 8×5
Discovered by John Conway
Year of discovery 1970

An overweight spaceship (or OWSS for short) is a would-be spaceship similar to the lightweight spaceship, middleweight spaceship and heavyweight spaceship, but longer. On its own an overweight spaceship is unstable. For example, in the shortest overweight spaceship, the three cells at its top do not die off like the corresponding sparks at the top of the smaller spaceships. Nonetheless, it can be escorted by true spaceships to form a flotilla.

Overweight Spaceship with escort

For OWSS with top spark over 4, minimal escort size difference is 4, as shown.

Meta-flotillas

It is also possible to stabilize the OWSS with more OWSSes, which then have to be stabilized by more xWSSes. An example is shown below.

Overweight spaceship supported by more overweight spaceships.

Glider synthesis

Many lengths of overweight spaceship can be constructed by colliding gliders.[1] Recent syntheses are collected in the xq4 synthesis listing in Catagolue[2]; a number of older recipes can be found in Mark Niemiec's synthesis database.[3]

In other rules

The non-totalistic rule FattyLife (B3-n4nt5qr6i/S23) is specifically tailored to support the overweight spaceship with spark length 3, making it a p8 spaceship.

References

  1. Martin Grant (June 5, 2019). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  2. "xq4 census". Catagolue. Retrieved on October 28, 2019.
  3. Mark Niemiec. "Overweight spaceship flotillae". Mark Niemiec's database. Retrieved on October 28, 2019.

External links