RF48H
RF48H | |||||||
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 | ||||||
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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 up 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.
RF48Ha[1] (click above to open LifeViewer) |
RF48Hb[1] (click above to open LifeViewer) |
RF48Hc[1] (click above to open LifeViewer) |
RF48Hd[1] (click above to open LifeViewer) |
RF48He[1] (click above to open LifeViewer) |
RF48Hf[1] (click above to open LifeViewer) |
RF48Hg[2] (click above to open LifeViewer) |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 The Hunting of the Elementary Conduits (discussion thread) at the ConwayLife.com forums
- ↑ Christopher D'Agostino (September 10, 2022). Re: The Hunting of the Elementary Conduits (discussion thread) at the ConwayLife.com forums
External links
- RF48H at the Life Lexicon
- Stephen Silver on Stable Reflectors at Paul Callahan's Page of Conway's Life Miscellany
- Patterns
- Patterns with 7 cells
- Patterns found by Stephen Silver
- Patterns found in 1997
- Conduits
- Converters
- R-pentomino conduits
- R-pentomino-to-Herschel converters
- Conduits with output orientation F
- Conduits with output offset (20, 1)
- Conduits with recovery time 130
- Conduits with minimum overclock time 127
- Spartan conduits