Crawler: Difference between revisions
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The reaction was known for a long time, however the idea of a spaceship powered by this reaction was mentioned much later in 2002 by [[David Bell]] who had discovered reactions between multiple pies, which [[Rake|emitted gliders]]. After much work, [[Gabriel Nivasch]] finished construction of [[caterpillar]], the first [[17c/45 orthogonal]] spaceship, on 31 December {{year|2004}}. | The reaction was known for a long time, however the idea of a spaceship powered by this reaction was mentioned much later in 2002 by [[David Bell]] who had discovered reactions between multiple pies, which [[Rake|emitted gliders]]. After much work, [[Gabriel Nivasch]] finished construction of [[caterpillar]], the first [[17c/45 orthogonal]] spaceship, on 31 December {{year|2004}}. | ||
Research has been conducted into building much smaller 17c/45 spaceships with pi crawlers, analogously to the silverfish. Discussion has been ongoing since as early as 2013.<ref | Research has been conducted into building much smaller 17c/45 spaceships with pi crawlers, analogously to the silverfish. Discussion has been ongoing since as early as 2013.<ref name="post10028" /> | ||
===31c/240 Herschel crawler=== | ===31c/240 Herschel crawler=== | ||
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===Half-bakery reaction=== | ===Half-bakery reaction=== | ||
There is a well-known reaction in which a glider crashes into the side of a [[half-bakery]], shifting the loaves and releasing a glider. This reaction has been used to create [[Half-baked knightship]] and [[parallel HBK]], and research has been conducted into a potential caterpillar-like knightship using the reaction.<ref | There is a well-known reaction in which a glider crashes into the side of a [[half-bakery]], shifting the loaves and releasing a glider. This reaction has been used to create [[Half-baked knightship]] and [[parallel HBK]], and research has been conducted into a potential caterpillar-like knightship using the reaction.<ref name="post15549" /> | ||
== Fuses which could be made into climbers == | == Fuses which could be made into climbers == | ||
| Line 50: | Line 50: | ||
=== (8,1)c/32 p128 Herschel fuse === | === (8,1)c/32 p128 Herschel fuse === | ||
This fuse eats gliders, spitting out double the amount of gliders, but leaving blocks behind in the process.<ref | This fuse eats gliders, spitting out double the amount of gliders, but leaving blocks behind in the process.<ref name="post13104" /> | ||
=== (40,7)c/244 Herschel fuse === | === (40,7)c/244 Herschel fuse === | ||
Consuming blinkers, a new blinker is produced by a significant shift. However, a large cluster of debris is left in the other direction, making stabilisation appear challenging.<ref | Consuming blinkers, a new blinker is produced by a significant shift. However, a large cluster of debris is left in the other direction, making stabilisation appear challenging.<ref name="post10714" /> | ||
== References == | ==References== | ||
<references /> | <references> | ||
<ref name="post10028">{{LinkForumThread | |||
|format = ref | |||
|title = Caterpillar's little brother research | |||
|p = 10028 | |||
|author = Ivan Fomichev | |||
|date = December 8, 2013 | |||
}}</ref> | |||
<ref name="post15549">{{LinkForumThread | |||
|format = ref | |||
|title = HBK as Caterpillar | |||
|p = 15549 | |||
|author = Brett Berger | |||
|date = January 2, 2015 | |||
}}</ref> | |||
<ref name="post13104">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Interesting fuses | |||
|p = 13104 | |||
|author = Sphenocorona | |||
|date = September 6, 2014 | |||
}}</ref> | |||
<ref name="post10714">{{LinkForumThread | |||
|format = ref | |||
|title = Interesting fuses | |||
|p = 10714 | |||
|author = Sphenocorona | |||
|date = February 9, 2014 | |||
}}</ref> | |||
</references> | |||
==External links== | ==External links== | ||
{{LinkForumThread|f=2|t=1182|title=13131: The B-Heptomino/Glider Spaceship Thread}} | {{LinkForumThread|f=2|t=1182|title=13131: The B-Heptomino/Glider Spaceship Thread}} | ||
{{LinkForumThread|f=2|t=1142|title=(23,5)c/79 spaceship components}} | |||
{{LinkForumThread|f=2|t=2130|title=(27,1)c/72 caterpillar challenge}} | {{LinkForumThread|f=2|t=2130|title=(27,1)c/72 caterpillar challenge}} | ||
{{LinkForumThread|f=2|t=2286|title=(34,7)c/156 caterpillar}} | {{LinkForumThread|f=2|t=2286|title=(34,7)c/156 caterpillar}} | ||
{{LinkForumThread|f=2|t=1539|title=(13,4)c/41 crawlers}} | {{LinkForumThread|f=2|t=1539|title=(13,4)c/41 crawlers}} | ||
Revision as of 19:03, 4 August 2021
A crawler or climber is a reaction in which two objects (or groups of) collide, leaving one of the objects moved backwards or forwards to a degree, and the other forward. Crawler reactions are commonly used to create engineered spaceships, also known as caterpillars.
List of crawlers
17c/45 pi heptomino crawler
Perhaps the first and most well known climber is the infamous 17c/45 reaction, consisting of pi heptomino running over a blinker, moving it back 6 cells and rephasing it, whilst the pi heptomino moves forward 17 cells. This takes place in 45 generations.
The reaction was known for a long time, however the idea of a spaceship powered by this reaction was mentioned much later in 2002 by David Bell who had discovered reactions between multiple pies, which emitted gliders. After much work, Gabriel Nivasch finished construction of caterpillar, the first 17c/45 orthogonal spaceship, on 31 December 2004.
Research has been conducted into building much smaller 17c/45 spaceships with pi crawlers, analogously to the silverfish. Discussion has been ongoing since as early as 2013.[1]
31c/240 Herschel crawler
Another orthogonal crawler, the 31c/240 reaction, consisting of a Herschel crawling though blocks.
Four 31c/240 spaceships are known, three of which use the crawler; shield bug, centipede, and silverfish. The fourth, centipede caterloopillar, relies on universal constructor technology instead of conventional crawlers.
(23,5)c/79 Herschel climber
The (23,5)c/79 Herschel climber involves a Herschel reacting with a stream of gliders, emitting more gliders behind it in the same way, displacing the Herschel by 23 cells vertically and 5 horizontally in the space of 79 generations. It can also crawl on certain still lifes as well as gliders.
This climber has been engineered and other components assembled by hand to create waterbear, which was the fastest known oblique spaceship until the discovery of Sir Robin in 2018.
(13,1)c/31 Pseudo-B climber
An interesting climber, the (13,1)c/31 Pseudo-B climber involves a climbing reaction that never isolates itself into a Herschel or B-heptomino. It was first mentioned by Gabriel Nivasch as an afterthought on his caterpillar article.
No spaceships have been built with this reaction as of yet.
(27,1)c/72 Herschel climber
Much research has been conducted into a spaceship based on the (27,1)c/72 Herschel climber.
(34,7)c/156 Herschel climber
The (34,7)c/156 Herschel climber is a little-known, mainly unspoken climber. Work is being done to build a caterpillar using this climber.
(13,4)c/41 climber
Consists of a b-heptomino climbing on gliders. Was initially proposed in 2014, but no development started until 2021.
Half-bakery reaction
There is a well-known reaction in which a glider crashes into the side of a half-bakery, shifting the loaves and releasing a glider. This reaction has been used to create Half-baked knightship and parallel HBK, and research has been conducted into a potential caterpillar-like knightship using the reaction.[2]
Fuses which could be made into climbers
The following lists fuses which show potential for being made into workable climbers, but progress is yet to be made.
(8,1)c/32 p128 Herschel fuse
This fuse eats gliders, spitting out double the amount of gliders, but leaving blocks behind in the process.[3]
(40,7)c/244 Herschel fuse
Consuming blinkers, a new blinker is produced by a significant shift. However, a large cluster of debris is left in the other direction, making stabilisation appear challenging.[4]
References
- ↑ Ivan Fomichev (December 8, 2013). Caterpillar's little brother research (discussion thread) at the ConwayLife.com forums
- ↑ Brett Berger (January 2, 2015). HBK as Caterpillar (discussion thread) at the ConwayLife.com forums
- ↑ Sphenocorona (September 6, 2014). Re: Interesting fuses (discussion thread) at the ConwayLife.com forums
- ↑ Sphenocorona (February 9, 2014). Interesting fuses (discussion thread) at the ConwayLife.com forums
External links
- 13131: The B-Heptomino/Glider Spaceship Thread (discussion thread) at the ConwayLife.com forums
- (23,5)c/79 spaceship components (discussion thread) at the ConwayLife.com forums
- (27,1)c/72 caterpillar challenge (discussion thread) at the ConwayLife.com forums
- (34,7)c/156 caterpillar (discussion thread) at the ConwayLife.com forums
- (13,4)c/41 crawlers (discussion thread) at the ConwayLife.com forums