RF48H

RF48H
x = 28, y = 9, rule = B3/S23 6bo18bo$6b2o17bo$5b2o18b3o$27bo2$b2o$o2bo$obo$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] [[ THUMBSIZE 2 GPS 10 ZOOM 14 PAUSE 2 T 48 PAUSE 2 LOOP 100 ]]
View static image
Pattern type	Conduit
Conduit type	Converter
Input	R-pentomino
Output	Herschel
Number of cells	7
Output orientation	Unturned
Output offset	(20, 1)
Step	48 ticks
Recovery time (ignoring FNG if any)	130 ticks
Minimum overclock period (ignoring FNG if any)	127 ticks
Spartan?	Yes
Discovered by	Stephen Silver
Year of discovery	1997
Pattern files Plaintext rf48h.cells RLE rf48h.rle

RF48H is an elementary converter discovered by Stephen Silver with gencols in October 1997, which transforms an R-pentomino to a Herschel in 48 generations. In the pattern shown to the right, a ghost Herschel marks the output location.

The original version consists of a single transparent loaf that is not restored until generation 87, and the rest of spark does not vanish until generation 130. To avoid hitting the spark and causing an explosion, the output Herschel's first natural glider must be suppressed by connecting the converter to a dependent conduit, or by using a tub-with-tail eater or sidesnagger. Moreover, the low input clearance only allows for Paul Callahan's Herschel receiver or HRx65R to be the preceding conduit, leading to a high repeat time of 127 ticks.

As of June 2020 this converter has six known elementary variants.

The loaf can be shifted one cell down and flipped to produce a different conduit, RF28B, with an improved recovery time. The extra block of the B-heptomino is not cleaned up in that case, unless an elementary conduit with a B-heptomino input such as BF20H or BFx59H is added.

Variants

In the patterns, a ghost Herschel marks the output location.

x = 28, y = 9, rule = B3/S23 6bo18bo$6b2o17bo$5b2o18b3o$27bo2$b2o$o2bo$obo$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48Ha (click above to open LifeViewer)

x = 23, y = 23, rule = B3/S23 b2o$b2o$12bo$10b3o$9bo$9b2o3$bo18bo$b2o17bo$2o18b3o$22bo6$10b2o$10bobo $12bo$2bo9b2o$bobo$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48Hb (click above to open LifeViewer)

x = 23, y = 24, rule = B3/S23 8b2o$4b2o2bo$4bobobo$7bo4bo$10b3o$9bo$9b2o3$bo18bo$b2o17bo$2o18b3o$22b o6$10b2o$10bobo$12bo$2bo9b2o$bobo$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48Hc (click above to open LifeViewer)

x = 31, y = 25, rule = B3/S23 16b2o$12b2o2bo$12bobobo$15bo4bo$18b3o$17bo$17b2o3$9bo18bo$9b2o17bo$8b 2o18b3o$30bo4$29b2o$25bo3b2o$18b2o4bobo$18bobo2bobo$20bo2bo$2b2o16b4o$ 3bo$3o17b2o$o19b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48Hd (click above to open LifeViewer)

x = 31, y = 30, rule = B3/S23 16b2o$12b2o2bo$12bobobo$15bo4bo$18b3o$17bo$17b2o3$9bo18bo$9b2o17bo$8b 2o18b3o$30bo4$29b2o$25bo3b2o$24bobo$23bobo$23bo$14bo7b2o$13bobo$13b2o 2$6b2o$2b2o2b2o$bobo$bo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48He (click above to open LifeViewer)

x = 32, y = 16, rule = B3/S23 10bo18bo$10b2o17bo$9b2o18b3o$31bo5$2b2o18b2o$bobo19bo$bo18b3o$2o10b2o 6bo$5b2o5bobo$6bo7bo$3b3o8b2o$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48Hf (click above to open LifeViewer)

x = 24, y = 26, rule = B3/S23 8b2o$4b2o2bo$4bobobo3b2o$7bo3bobo$11bo$b2o7b2o$o2bo$b2o7$2bo18bo$2b2o 17bo$b2o18b3o$23bo7$b2o$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48Hg (click above to open LifeViewer)

x = 28, y = 21, rule = B3/S23 6b2o$6b2o3b2o$11bo$2o2b6obo$o2bo6bo$b3o2bobo$4b3ob2o$3bo$4b3ob2o$6bob 2o3$13b2o$13b2o4$6bo18bo$6b2o17bo$5b2o18b3o$27bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 15 ]]

RF48Hh (click above to open LifeViewer)

External links

• RF48H at the Life Lexicon
• Stephen Silver on Stable Reflectors at Paul Callahan's Page of Conway's Life Miscellany