Period-7 sparkers
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| Sparkers | |
| Lists | p7 • p8 • p9 • p10 |
|---|---|
| Related | With specific period With specific spark type |
This is a list of known period-7 sparkers. While such sparkers can still be found with JLS and WLS, due to the relatively high period, such searches can take weeks or months to complete.
Dot sparkers and functional dot sparkers
| 34P7: A small corner-dot sparker. Similar to meatball, with lower population but larger bounding box. Sometimes 34P7 will work where meatball doesn't and vice versa (click above to open LifeViewer) RLE: here Plaintext: here |
| 38P7.2: It is not very robust, and its dot spark is not isolated (click above to open LifeViewer) RLE: here Plaintext: here |
| Meatball: A small, robust sparker that emits dot sparks with decent clearance. Similar to 34P7, with higher population but smaller bounding box. Sometimes meatball will work where 34P7 doesn't and vice versa (click above to open LifeViewer) RLE: here Plaintext: here |
| p7 pipsquirter: mainly functions as a dot, but also has rarer uses as a vertical domino (click above to open LifeViewer) RLE: here Plaintext: here |
| An edgier form of the p7 pipsquirter. In most cases, the other form is more useful, but it depends on the dimensions (click above to open LifeViewer) RLE: here Plaintext: here |
| p7 thumb: Being only 10 cells thick, it's useful for reducing bounding boxes. It's also useful if two sparks need to be close together; in addition to it naturally being a double sparker (spacing 8), the tub on the left can be replaced with a gutter (spacing 7), be replaced with a block (spacing 10),[n 1] remain as a tub (spacing 11), or become a beehive (spacing 12), and a second copy can be added on the other side (click above to open LifeViewer) RLE: here Plaintext: here |
| 120P7: a relatively large middleweight sparker, sometimes used as a duoplet sparker[n 2] (click above to open LifeViewer) RLE: here Plaintext: here |
| 168P7: large but nevertheless sometimes necessary. The original form of the period-49 glider gun used these sparkers (click above to open LifeViewer) RLE: here Plaintext: here |
| 121P7: smaller and edgier than 168P7 but not as robust (click above to open LifeViewer) RLE: here Plaintext: here |
| 138P7: can be used if the side middleweight sparks interfere (click above to open LifeViewer) RLE: here Plaintext: here |
| T-nosed p7: usually outclassed by the p7 pipsquirter (click above to open LifeViewer) RLE: here Plaintext: here |
- ↑ A symmetrical stator variant (with a height of 9 cells instead of 10) stabilised by blocks (that can be moved back) occurred seminaturally in a soup submitted by Charity Engine on 2022-11-15
- ↑ Can hassle blinkers into being p7 also, as found by Charity Engine on 2022-11-17
Domino sparkers
Edgy domino sparks can sometimes be used as dots.
| 62P7: A small and highly robust sparker, which is usually the best option for a domino spark (click above to open LifeViewer) RLE: here Plaintext: here |
| 678P7: Sometimes 62P7 is too wide, so the very large 678P7 is needed instead. There are also a few rare uses where the active reaction destroys 62P7 but not 678P7 (click above to open LifeViewer) RLE: here Plaintext: here |
| 44P7.2: produces a small, edgy, delayed domino. It usually doesn't work, but if it does, it should be used (click above to open LifeViewer) RLE: here Plaintext: here |
| 28P7.1: The spark is weak enough that it usually can't be used to sustain something else; instead, it gets used more as part of a phase-changing mechanism (7n+1). Oscillators that phase change in this way typically work just as well without the 28P7.1 (click above to open LifeViewer) RLE: here Plaintext: here |
| 60P7: if the active reaction doesn't recede by generation 3, it will be destroyed. The main advantage of this over 62P7 is that the sides don't stick as far out in front, meaning it often fits in places where 62P7 doesn't. Despite the spark not being isolated, this doesn't make it any less useful (click above to open LifeViewer) RLE: here Plaintext: here |
| The original form of 60P7 found by Josh Ball. It has worse clearance, but it recedes faster in generation 1 which can allow it to work in cases where 60P7 does not. The two support types can also be combined to make a hybrid (click above to open LifeViewer) RLE: here Plaintext: here |
| 132P7: If the active reaction doesn't recede by generation 4, it will be destroyed (click above to open LifeViewer) RLE: here Plaintext: here |
| Hebdarole: This sparker is more historically significant than useful, as it has been outclassed by the newer sparkers in the section (click above to open LifeViewer) RLE: here Plaintext: here |
Other sparkers
As these sparkers have unique sparks, they have specialized uses.
| 28P7.3: Used in the period-21 glider gun (click above to open LifeViewer) RLE: here Plaintext: here |
| 37P7.1, used in the smallest period-126 glider gun (Catagolue: here) (click above to open LifeViewer) RLE: here Plaintext: here |
| 189P7, a banana sparker custom-designed for the p49 skewed pulsar hassler (click above to open LifeViewer) RLE: here Plaintext: here |
See also
- p7-assisted period-28 glider gun, which uses an even larger p7 sparker than 678P7
- 34P14 shuttle, which is smaller than almost all of the above and is a good alternative as long as the mechanism works at period 14
- p21 honey farm hassler, which is a pipsquirter that is a good alternative as long as the mechanism works at period 21