p7 pipsquirter

p7 pipsquirter
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Pattern type	Oscillator
Oscillator type	Pipsquirter
Number of cells	89
Bounding box	13 × 22
Period	7 (mod: 7)
Heat	15.4
Volatility	0.34 | 0.34
Kinetic symmetry	Unspecified
Discovered by	Noam Elkies
Year of discovery	1999
Rules Outer-totalistic rules B3/S23 – B38/S235678 # of rules 25 = 32 Isotropic rules B3-c/S23-a – B34e5ai6cn7c8/S234acqrwz5678
Pattern files Plaintext pipsquirter2.cells RLE pipsquirter2.rle
Identifiers apgcode xp7_03iajaqjk46zg2v0er8q6he8zp9gf8ck3sj2zxd55d2odzy2321

p7 pipsquirter is a period-7 pipsquirter discovered by Noam Elkies in August, 1999. Because of its easily-accessible domino spark, it is useful in the construction of larger patterns such as the p49 glider shuttle, the first known period 49 oscillator.

As a reflector

p7 pipsquirter is most useful because of its ability to act as a 90-degree glider reflector (see p7 bouncer) when it is combined with a block, boat and eater 1. It takes 9 generations to recover from the impact, and the input path (in green) and output path (in red) of the glider are shown below. This reaction is the basis of the p49 glider shuttle and the bricklayer.

File:Pipsquirter2reflector.png

Pipsquirter 2 acting as a reflector
RLE: here

A version of the pipsquirter stator with slightly higher clearance is shown in the p7 bouncer article.

Gallery

Variant by Karel Suhajda, 24 Jan 2003 RLE: here

Thinner form RLE: here

x = 152, y = 145, rule = B3/S23 71b2o$71b2o$57bo$57b3o$60bo9bob2o$59b2o9bobo$71bo$64bo6b2o$63bobo5b2o $63bo2bo4b2o$64b2o13b2o$78bobo$77b3o14bo$77b2o13b3o$80b2o9bo$79b3o9b 2o$58b2o$57bobo9bobo15bo$59bo10b2o7b2o6bo$70bo8b2o4b3o5$69b2o13bo$69b obo10b2o$71bo11b2o$71b2o2$69b4o21b3o$44b2o23bo2bo21bo$43bobo24bo14b2o bo6bo$45bo21b3o15b2ob3o$67bo23bo$85b2ob3o$86bobo$72b2o2b3o7bobo$76b3o 8bo$76b2o$75b2o$75bo3$108b3o$30b2o76bo$29bobo44b2o31bo$31bo32b2o9bobo 4b2o$65bo11bo4b2o$65bobo14b2o$66b2o14bo$69b2o10bobo$69b2o10bob2o$71b 3o$2bo65b2o2bo$b3o49bo2bo2bo8b2ob3o8b2o$3obo48b7o2bo6b2o11b2o$bo3bo 54b3o7bo2b2o$2bo3bo48b2obo12b3o48b3o$3bob3o8b2o36bo3b3o11bo49bo$4b3o 8bobo36bobo4bo61bo$5bo11bo35b2ob5obo$9bo44bo5bobo4b2o15b2o$8bobo43bo 2b3o2b2o3b2o15bobo$9b2o42b2ob2obobo24bo$5b2o48bobobobo24b2o$4bobo48bo bobob2o80bo2b2o$4bo5b2o40b2obo4bo81bo3b2o2b2o$3b2o5b2o40bo2b2obobo81b o7b2o$54bo5b2o81b4o$55b4o3bo$59bob2o$57b2o3bo5b3o8b2o55b3o$23b2o33bob 2o5bobo9bo56bo$22b2o34bobo6bo2bo6bobo57bo$24bo32b2o2bo5bo2bo6b2o63b2o $60b2o6bobo70bo2bo$67bo2bo69b2ob2o$55b2o11b2o72bo$54b3o11bo77b2o$53bo bo2bo2b2o22bo2bo2bo54bobo$53b2o2b2o2b2o19bo2b7o56bo$57b2o23b3o63b2o$ 86bob2o40bo$84b3o3bo39b2o$83bo4bobo38bobo$82bob5ob2o$37b2o26bo16bobo 5bo$36b2o25b2o11b3o2b2o2b3o2bo$38bo25b2o10b3o4bobob2ob2o$76b2o5bobobo bo$49bo25bo6b2obobobo$49b3o21b2o2bo6bo4bob2o$52bo21bo3bo5bobob2o2bo$ 51b2o21bo2bo5b2o5bo$52b3o20b3o4bo3b4o$53b3o26b2obo$52b5o7b2o16bo3b2o 28bo$51b2o3b2o7bo17b2obo29b2o$50b3o3b3o6bobo16bobo28bobo$51b2o3b2o8b 2o15bo2b2o$52b5o4b2o20b2o$53b3o5bobo$54bo8bo$63b2o18bo2b2o$82bo3b2o2b 2o$50bo31bo7b2o$49bobob2o28b4o$49bobobobo18b2o$46b2obobobobo2bo17b2o$ 46bo2bo2b2ob4o11b2o5bo$48b2o4bo14bo7bo24bo$54bobo12bo6bo25b2o$55b2o 12bo3b2o26bobo8$80bo8bo$61b2o15b3o6bobo$60bo2bo5b2o6bo10b2o$63bo4b2o 7b2o$63bo6bo$60b2obo22b2o$60b2o11b2o11b2o2b2o$70b2o2bo15bobo$70bo2bo 17bo$61b2o8b3o20b3o$61b2o19b2o4b2o3bo$82bo6bo3bo3bo$80bobo3b3o4bo2bob o$80b2o4bo8bobo2bo$96bo3bo$100bo$97b3o$67b2o$68bo$65b3o$65bo$70b2o3b 2o$71bo3bo8bo$68b3o5b3o6bo$68bo9bo4b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 3.5 AUTOSTART WIDTH 700 HEIGHT 700 ]] True period 56 gun (click above to open LifeViewer) RLE: here Plaintext: here

See also

• p6 pipsquirter

External links

• p7 pipsquirter at the Life Lexicon

• P7 pipsquirter at Adam P. Goucher's Catagolue