[[Dave Greene]] noted that the 2-engine Cordership, like its [[3-engine Cordership|3-engine]] counterpart, can be stopped by a single [[glider]] from behind without releasing any [[glider]]s or other [[spaceship]]s,<ref name="post54470" /> and updated [[Martin Grant]]'s [[Model D Heisenburp|Model D]] [[Heisenburp device]] for the 2-engine Cordership.<ref name="post54470" />
[[Dave Greene]] noted that the 2-engine Cordership, like its [[3-engine Cordership|3-engine]] counterpart, can be stopped by a single [[glider]] from behind without releasing any [[glider]]s or other [[spaceship]]s,<ref name="post54470" /> and updated [[Martin Grant]]'s [[Model D Heisenburp|Model D]] [[Heisenburp device]] for the 2-engine Cordership.<ref name="post54470" />
[[Dave Greene]], [[Blinkerspawn]] and [[Matthias Merzenich]] noted that the 2-engine Cordership can be eaten by a constellation of two [[eater]]s and three [[block]]s:<ref name="post54470" />
[[Dave Greene]], [[BlinkerSpawn]] and [[Matthias Merzenich]] noted that the 2-engine Cordership can be eaten by a constellation of two [[eater]]s and three [[block]]s:<ref name="post54470" />
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==Glider to 2-engine Cordership==
Glider to 2-engine Cordership is a [[converter]] constructed by [[Nathaniel Johnston]] on August 29, {{year|2018}},<ref name="post63153" /> which converts an input [[glider]] to a 2-engine Cordership.
|caption = Converts an input glider to a 2-engine Cordership<br/>
}}
==Uses==
==Uses==
[[David Bell]] built a [[log(t) growth]] from four 2-engine Corderships,<ref name="post54585" /> and a 4-engine Cordership [[rake]] from two adjacent 2-engine Corderships,<ref name="post54628" /> both on January 3rd, {{year|2018}}. [[2718281828]], [[Dave Greene]] and [[Chris Cain]] posted glider syntheses for this rake on January 7th, allowing for the construction of [[breeder]]s.<ref name="post54798" /><ref name="post54801" /><ref name="post54808" />
[[David Bell]] built a [[log(t) growth]] from four 2-engine Corderships,<ref name="post54585" /> and a 4-engine Cordership [[rake]] from two adjacent 2-engine Corderships,<ref name="post54628" /> both on January 3rd, {{year|2018}}. [[2718281828]], [[Dave Greene]] and [[Chris Cain]] posted glider syntheses for this rake on January 7th, allowing for the construction of [[breeder]]s.<ref name="post54798" /><ref name="post54801" /><ref name="post54808" />
Bell further built two different period 96 c/12 forward rakes, one using the 4-engine rake, along with the 2-engine Cordership and an older 3-engine block [[puffer]],<ref name="post54784" /> the other using a new Cordership [[boat]] and [[block]] puffer, two 2-engine Corderships, and a sideways rake, both on January 6th, 2018.<ref name="post54784" /> He also built a different Cordership made from a two-engine boat puffer and a 2-engine Cordership that contains a glider which can escape if the [[boat]] is deleted by a sideways or forward glider.<ref name="post54784" />
Bell further built two different period-96 c/12 forward rakes, one using the 4-engine rake, along with the 2-engine Cordership and an older 3-engine block [[puffer]],<ref name="post54784" /> the other using a new Cordership [[boat]] and [[block]] puffer, two 2-engine Corderships, and a sideways rake, both on January 6th, 2018.<ref name="post54784" /> He also built a different Cordership made from a two-engine boat puffer and a 2-engine Cordership that contains a glider which can escape if the [[boat]] is deleted by a sideways or forward glider.<ref name="post54784" />
[[Chris Cain]] updated the [[infinite glider hotel]] to use the 2-engine Cordership on January 3rd, 2018.<ref name="post54590" />
[[Chris Cain]] updated the [[infinite glider hotel]] to use the 2-engine Cordership on January 3rd, 2018.<ref name="post54590" />
'[[User:Entity Valkyrie|Entity Valkyrie]]' built an 714×501 2-engine Cordership gun on January 6, 2018, using [[Luka Okanishi]]'s 9-glider synthesis;<ref name="post54750" /> [[BlinkerSpawn]] noted that this gun could be compacted to 385×253 using the [[quadri-Snark]].<ref name="post54753" /> [[Dave Greene]] built an unrelated period-556 2-engine Cordership gun on January 7th, 2018.<ref name="post54814" /><ref name="post54815" /> 'Entity Valkyrie' built a different gun using a [[boat]] [[keeper]] reaction on January 10, 2018.<ref name="post54928" />
[[Entity Valkyrie]] built an 714×501 2-engine Cordership gun on January 6, 2018, using [[Luka Okanishi]]'s 9-glider synthesis;<ref name="post54750" /> [[BlinkerSpawn]] noted that this gun could be compacted to 385×253 using the [[quadri-Snark]].<ref name="post54753" /> [[Dave Greene]] built an unrelated period-556 2-engine Cordership gun on January 7.<ref name="post54814" /><ref name="post54815" /> Entity Valkyrie built a different gun using a [[boat]] [[keeper]] reaction on January 10.<ref name="post54928" /> On August 29 that year, [[Nathaniel Johnston]] completed a stable glider to 2-engine Cordership [[converter]],<ref name="post63153" /> which converts an input glider to a 2-engine Cordership at [[repeat time]] 556 ticks, thus allowing for arbitrary high-period guns to be built. The following is an improved design by Dave Greene:
|caption = Converts an input glider to a 2-engine Cordership<br/>
}}
Using a variant of the same script used to discover it, [[praosylen]] combined the 2-engine Cordership with an additional switch engine to obtain various puffers.<ref name="post54816" />
Using a variant of the same script used to discover it, [[praosylen]] combined the 2-engine Cordership with an additional switch engine to obtain various puffers.<ref name="post54816" />
The 2-engine Cordership is a c/12 diagonalspaceship that was discovered by praosylen on December 31, 2017.[1] It is the Cordership that uses the fewest number of switch engines known to be possible (ahead of the 3-engine Cordership) as well as the smallest Cordership in terms of population (ahead of a variant of the 4-engine Cordership) and the smallest engineered spaceship.
gmc_nxtman pointed out that the 2-engine Cordership can reflect a glider 180 degrees, while preserving its mod-4 timing, resulting in an updated version of glider loop.[4]
Bell further built two different period-96 c/12 forward rakes, one using the 4-engine rake, along with the 2-engine Cordership and an older 3-engine block puffer,[14] the other using a new Cordership boat and block puffer, two 2-engine Corderships, and a sideways rake, both on January 6th, 2018.[14] He also built a different Cordership made from a two-engine boat puffer and a 2-engine Cordership that contains a glider which can escape if the boat is deleted by a sideways or forward glider.[14]
Entity Valkyrie built an 714×501 2-engine Cordership gun on January 6, 2018, using Luka Okanishi's 9-glider synthesis;[16]BlinkerSpawn noted that this gun could be compacted to 385×253 using the quadri-Snark.[17]Dave Greene built an unrelated period-556 2-engine Cordership gun on January 7.[18][19] Entity Valkyrie built a different gun using a boatkeeper reaction on January 10.[20] On August 29 that year, Nathaniel Johnston completed a stable glider to 2-engine Cordership converter,[21] which converts an input glider to a 2-engine Cordership at repeat time 556 ticks, thus allowing for arbitrary high-period guns to be built. The following is an improved design by Dave Greene:
Using a variant of the same script used to discover it, praosylen combined the 2-engine Cordership with an additional switch engine to obtain various puffers.[22]
Toward the end of 2018, Adam P. Goucher added a "0-degree" slow-salvo synthesis of a 2-engine Cordership to slmake, to allow more efficient long elbow pushes to be automatically compiled in self-constructingspaceshiprecipes.[23]
