PT8P

Not to be confused with PT38P.

PT8P
x = 10, y = 10, rule = B3/S23 5b2o$5bo$7bo$6b2o2$6b2o$3o2bobo$obo3bo$obo4b3o$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 9 ZOOM 24 GPS 2 PAUSE 2 T 8 PAUSE 2 WIDTH 480 HEIGHT 480 THUMBSIZE 2 ]]
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Pattern type	Conduit
Conduit type	Elementary
Input	Pi
Number of cells	15
Bounding box	5 × 10
Output orientation	Turned
Output offset	(1, 2)
Step	8 ticks
Recovery time (ignoring FNG if any)	Unknown
Minimum overclock period (ignoring FNG if any)	Unknown
Spartan?	No
Discovered by	Unknown
Year of discovery	Unknown
Rules Outer-totalistic rules B3/S23 – B368/S23678 # of rules 25 = 32 Isotropic rules B3-cekq/S2-n3-ky – B34cekwyz5ak67c8/S234cejknwz5-cjny678
Pattern files Plaintext pt8p.cells RLE pt8p.rle

PT8P (also known as the gourmet catalyst) is a small pi-heptomino conduit. After 8 ticks, it produces a pi-heptomino rotated 90 degrees at (1, 2) relative to the input.

Four copies of the conduit can be used to form a closed loop, such as in gourmet (hence the name "gourmet catalyst"). It is also used in oscillators such as Tanner's p46, p49 pi-heptomino hassler, and 120P34. Its smallest form consists of a cis-boat with tail and either aircraft carrier or snake.

Variants

Many variants of the conduit exist, both stable and periodic; the oscillators pi portraitor and popover use periodic versions.
The first line replace the aircraft carrier to other catalyst such as snake.
The second line and the third line replace all the catalyst, the second line is stable, the third line is periodic.

x = 77, y = 57, rule = B3/S23 5b2o19b2o20b2o16b2ob2o$5bo20bo20bobo17bob2o$7bo19bo19bo19bo$6b2o18b2o 18b2o18b2o2$6b2o18b2o18b2o18b2o$3o2bobo12b3o2bobo12b3o2bobo12b3o2bobo $obo3bo13bobo3bo13bobo3bo13bobo3bo$obo4b3o10bobo4b3o10bobo4b3o10bobo4b 3o$9bo19bo19bo19bo11$48b2o18bo$9bo37bo2bo16bobo$7b3o17b2o18bobobo15bo bo$6bo19bo2bo16b2ob2o15b2ob2o$7bo19bobo$6b2o18b2ob2o15b2ob2o15b2ob2o$ 3o2bo14b3o2bo5bo8b3o2bobobo10b3o2bobobo$obo3b2o12bobo3b2ob2o9bobo3bo2b o10bobo3bo2bo$obo4bo12bobo4bobo10bobo4b2o11bobo4b2o$7bobo17bo2bo$8b2o 18b2o10$4b2o20b2o$4b2o19bobo$6b2o17bobob2o12b3o17b3o$6b2o18bobobo$28b o$6b2o19bo2bo15b2o3b2o13b2o3b2o$3o2bobo12b3o4bo12b3o2bo2bo2b2o7b3o2bo 2bo2b2o$obo3bo13bobo4bo3bo8bobo3bobo11bobo3bobo$obo4b3o10bobo4bo3bo8b obo4bo12bobo4bo$9bo17bo23bo$27bo2bo20bo18b2obo$28bo20b3o18b2ob3o$26bo bobo18b2o25bo$25bobob2o18b2o2b3o14b2ob3o$25bobo23b3o17bobo$26b2o23b3o 17bobo$72bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 2 WIDTH 600 HEIGHT 500 T 8 PAUSE 1 AUTOSTART LOOP 9 ]]

Variants of the conduit, both stable and periodic
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See also

• Gourmet catalyst applications
• PT9B, another small pi conduit frequently used as a catalyst.
• PT38P, another conduit used in Tanner's p46.