# c/5 diagonal

c/5 diagonal | ||

Spaceship | Yes | |
---|---|---|

Puffer | Yes | |

Rake | Yes | |

Wickstretcher | Yes | |

Gun | No |

**c/5 diagonal** is a diagonal speed that is equivalent to one fifth of the speed of light.

## Spaceships

The first c/5 diagonal spaceship to be discovered was 295P5H1V1 and was found by Jason Summers on November 22, 2000.^{[1]} No other spaceships of this speed were discovered until January 8, 2005, when Jason summers found the much smaller 86P5H1V1. In July 2006 Nicolay Beluchenko discovered three new c/5 diagonal spaceships, including the asymmetric 67P5H1V1.^{[2]} The smallest known c/5 diagonal spaceship, 58P5H1V1, was discovered by Matthias Merzenich on September 5, 2010.^{[3]}

After a gap of several years, on March 26-27, 2020, AforAmpere found 138P5H1V1 and 171P5H1V1, new c/5 diagonal ships with a different shape from previous discoveries.^{[4]}

The first glider synthesis for a c/5 diagonal spaceship was found by Goldtiger997 and Tanner Jacobi in April 2020.^{[5]}^{[6]} A gun based on this synthesis has yet to be constructed.

## Puffers

The first c/5 diagonal puffer was built by Matthias Merzenich on September 5, 2010.^{[3]} It consists of four copies of 58P5H1V1 continually hassling a glider, leaving debris behind at a period of 1450.

A period-1540 glide-symmetric three-ship puffer was discovered by Peter Naszvadi in March 2020, shown to the right.^{[7]}

### Rakes

The first clean c/5 diagonal rake was constructed by Matthias Merzenich on September 7, 2010.^{[3]} The rake has a period of 1585 and works by circulating two gliders.

## Wickstretchers

The first c/5 diagonal wickstretcher was found by Matthias Merzenich on January 26, 2011.^{[3]} It consists of a tagalong pulled by two copies of 58P5H1V1 that stretches two tubs.

## See also

- c/5 orthogonal
- List of important speeds
- List of spaceships with speed c/5
- List of puffers with speed c/5

## References

- ↑ Jason Summers' jslife pattern collection.
- ↑ Heinrich Koenig (July 15, 2006). "New c/5 Diagonal Spaceships". Game of Life News.
- ↑
^{3.0}^{3.1}^{3.2}^{3.3}Adam P. Goucher (January 26, 2011). "New c/5 diagonal technology". Game of Life News. - ↑ AforAmpere (March 26, 2020). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Tanner Jacobi (April 2, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ Goldtiger997 (April 3, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ Peter Naszvadi (March 27, 2020). Re: Thread For Your Useless Discoveries (discussion thread) at the ConwayLife.com forums

## External links

- c/5 spaceship at the Life Lexicon