Difference between revisions of "Pre-pulsar spaceship"

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{{Spaceship|name=Pre-pulsar spaceship|pname=prepulsarspaceship|dir=Orthogonal|p=30|s=c/5|c=128|bx=73|by=14|h=131.5|discoverer=David Bell|discoveryear=1998|life105=true|life106=true|plaintext=true|rle=true|animated=true}}
{{Spaceship|name=Pre-pulsar spaceship|pname=prepulsarspaceship|dir=Orthogonal|p=30|s=c/5|c=128|bx=73|by=14|h=131.5|discoverer=David Bell|discoveryear=1998|life105=true|life106=true|plaintext=true|rle=true|animated=true}}
'''Pre-pulsar spaceship''' (or '''PPS''' for short) is any of three different [[period]] [[:Category:Spaceships with period 30|30]] [[:Category:Spaceships with speed c/5|c/5]] orthogonal [[spaceship]]s in which a [[pre-pulsar]] is pushed by a pair of [[spider]]s. The back [[spark]]s of these spaceships can be used to perturb [[glider]]s in many different ways, allowing the easy construction of c/5 [[puffer]]s.
'''Pre-pulsar spaceship''' (or '''PPS''' for short) is any of three different [[period]] [[:Category:Spaceships with period 30|30]] [[c/5 orthogonal|c/5]] orthogonal [[spaceship]]s in which a [[pre-pulsar]] is pushed by a pair of [[spider]]s. The back [[spark]]s of these spaceships can be used to perturb [[glider]]s in many different ways, allowing the easy construction of c/5 [[puffer]]s.


The first pre-pulsar spaceship, the '''symmetric pre-pulsar spaceship''' (or '''SPPS''' for short, shown to the right) was found by [[:Category:Patterns found by David Bell|David Bell]] in May [[:Category:Patterns found in 1998|1998]] and was based on a period [[:Category:Spaceships with period 15|15]] pre-pulsar spaceship found by [[:Category:Patterns found by Noam Elkies|Noam Elkies]] in December [[:Category:Patterns found in 1997|1997]].
The first pre-pulsar spaceship, the '''symmetric pre-pulsar spaceship''' (or '''SPPS''' for short, shown to the right) was found by [[:Category:Patterns found by David Bell|David Bell]] in May [[:Category:Patterns found in 1998|1998]] and was based on a period [[:Category:Spaceships with period 15|15]] pre-pulsar spaceship found by [[:Category:Patterns found by Noam Elkies|Noam Elkies]] in December [[:Category:Patterns found in 1997|1997]].

Revision as of 06:55, 10 August 2009

Pre-pulsar spaceship
x = 69, y = 13, rule = B3/S23 31bo5bo$30b3o3b3o4$2b2o5b2o5b2o5b2o19b2o5b2o5b2o5b2o$o3bo3bo2bo3bo2bo 3bo3bo15bo3bo3bo2bo3bo2bo3bo3bo$o3bobob3o5b3obobo3bo15bo3bobob3o5b3obo bo3bo$o5b2o2b3ob3o2b2o5bo15bo5b2o2b3ob3o2b2o5bo$2ob3o15b3ob2o15b2ob3o 15b3ob2o$o25bo15bo25bo$bo3bo15bo3bo17bo3bo15bo3bo$2bo2bo15bo2bo19bo2bo 15bo2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
Pattern type Spaceship
Number of cells 128
Bounding box 73 × 14
Direction Orthogonal
Period 30
Mod Unknown
Speed c/5 | Unknown
Heat 131.5
Discovered by David Bell
Year of discovery 1998

Pre-pulsar spaceship (or PPS for short) is any of three different period 30 c/5 orthogonal spaceships in which a pre-pulsar is pushed by a pair of spiders. The back sparks of these spaceships can be used to perturb gliders in many different ways, allowing the easy construction of c/5 puffers.

The first pre-pulsar spaceship, the symmetric pre-pulsar spaceship (or SPPS for short, shown to the right) was found by David Bell in May 1998 and was based on a period 15 pre-pulsar spaceship found by Noam Elkies in December 1997.

The asymmetric pre-pulsar spaceship (or APPS for short, shown below) was found by Alan Hensel, also in May 1998.

The third period 30 pre-pulsar spaceship, shown below, is similar to the symmetric pre-pulsar spaceship but contains an extra T-tetromino between the spiders and is glide symmetric.

Image gallery

The asymmetric pre-pulsar spaceship.
Download RLE: click here
The glide symmetric pre-pulsar spaceship.
Download RLE: click here

External links