Lx73
| Lx73 | |||||||
| View static image | |||||||
| Pattern type | Conduit | ||||||
|---|---|---|---|---|---|---|---|
| Conduit type | Elementary | ||||||
| Input | Herschel | ||||||
| Number of cells | 134 | ||||||
| Bounding box | 37 × 33 | ||||||
| Output orientation | Turned left, flipped | ||||||
| Output offset | (12, -20) | ||||||
| Step | 73 ticks | ||||||
| Recovery time (ignoring FNG if any) |
70 ticks | ||||||
| Minimum overclock period (ignoring FNG if any) |
Unknown | ||||||
| Spartan? | No | ||||||
| Dependent? | No | ||||||
| Discovered by | David Buckingham Scot Ellison | ||||||
| Year of discovery | Unknown | ||||||
| |||||||
Lx73 is a periodic elementary conduit. After 73 ticks, it produces an inverted Herschel turned 90 degrees counterclockwise at (12, -20) relative to the input. The form shown in the infobox has a recovery time of 70 ticks; without the block-suppressing eater 1 and the eater 5 that eats the output's first natural glider, the recovery time increases to 120 ticks.
History
In 1991, about the same time some p8 R64 conduits were discovered, Dave Buckingham constructed two p8 versions of Lx73, one of which uses a figure eight and the other one two blockers. The second variant releases an extra glider to the southeast, enabling the construction of gunstar 2 on November 20.
| Two p8 versions of Lx73 (click above to open LifeViewer) RLE: here Plaintext: here |
In May 2007, Scot Ellison found a smaller version of the heavyweight volcano for the conduit, as shown in the infobox.[1] It has better clearance in the north, allowing an initial eater 1 catalyst positioned as in Fx77 or in F117 without welding; this is necessary in most elementary H-to-X conduits. For comparison an older, bulkier p5 variant is employed in the period-435 glider gun followed by R64.
Variants
Sparkers at other periods can also support the conduit, for example p6 pipsquirter, p7 pipsquirter and a p9 thumb. The interaction between spark and Herschel is slightly different from the p5 and p8 variants.
| p6, p7 and p9 versions of Lx73 (click above to open LifeViewer) RLE: here Plaintext: here |
In the patterns shown above, ghost Herschels mark the output Herschels' locations.
HLx53B
As can be seen at generation 53, an intermediate B-heptaplet forms inside an Lx73 conduit, which will evolve into the output Herschel 20 generations later. Meanwhile the residual block is cleaned along with other junks. If instead the block survives, the mechanism will become a Herschel to B-heptomino converter known as HLx53B:
| HLx53B converter (click above to open LifeViewer) RLE: here Plaintext: here |
After the discovery of BFx59H by Dave Buckingham, it immediately led to L112. The known stable BF20H variants does not fit due to the initial block-eating eater 1, and thus a simple, stable Lx73 has not been discovered.
The Lx73 variant with a figure eight above accommodates Fx119 when succeeded by BFx59H, making an L112-based Herschel duplicator.[2]
See also
References
- ↑ New p5 Herschel technology at Game of Life News. Posted by Dave Greene on February 1, 2008.
- ↑ nokangaroo (January 9, 2018). L112 Herschel duplicator with p8 oscillator (discussion thread) at the ConwayLife.com forums
External links
- Buckingham on B-heptominos in oscillators at Paul Callahan's Page of Conway's Life Miscellany
- Patterns
- Patterns with between 130 and 139 cells
- Patterns found by David Buckingham
- Patterns found by Scot Ellison
- Conduits
- Elementary conduits
- Herschel conduits
- Conduits with output orientation Lx
- Conduits with output offset (12, -20)
- Conduits with recovery time 70
- Non-Spartan conduits
- Independent conduits
- Periodic conduits