Space rake
Space rake is a period 20 forward glider rake constructed around 1971, probably by Bill Gosper; it was the first known rake. It consists of an ecologist with a lightweight spaceship added to turn its dying debris into gliders.
Space rake | |||||||
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Pattern type | Rake Puffer | ||||||
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Number of cells | 65 | ||||||
Bounding box | 22×19 | ||||||
Direction | Orthogonal | ||||||
Period | 20 | ||||||
Speed | c/2 | ||||||
Discovered by | Unknown | ||||||
Year of discovery | Unknown | ||||||
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Note that if the back lightweight spaceship is flipped vertically and moved down by one cell, then this becomes a period 20 backward glider rake, as shown below.[1]
Image gallery
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gollark: CURRYING!
gollark: Yep!
gollark: <@!282843668228997120> RECORDS!
gollark: Oh, that was a stupid, yes.
gollark: What?
References
- Alan Hensel's lifep.zip pattern collection.
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