OCA:Just Friends/3-cell spaceship

Main article: OCA:Just Friends

x = 3, y = 2, rule = B2-a/S12 2bo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

The c/6d three-cell spaceship in Just Friends (B2-a/S12) (click above to open LifeViewer) Catagolue: here

x = 3, y = 2, rule = B2-a/S12-k 2bo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

The c/4d three-cell spaceship in B2-a/S12-k (click above to open LifeViewer) Catagolue: here

There is a very common 3-cell spaceship in Just Friends and similar rules. In Just Friends, it is c/6 diagonal, conjectured to be the fastest diagonal spaceship in that rule. Removing S2k from that rule speeds it up to c/4 diagonal.

In Just Friends, there is a period-26 oscillator that can reflect the spaceship at both 90° and 180° angles.

x = 55, y = 26, rule = B2-a/S12 8b5o26b5o2$9bobo$9bobo$10bo29bobo$41bo$41bo3$22bo2bo$22bo2bo14bo$20b2o bobo13bo14bo$o2bo18bo2bo13bo11b2obo$o2bo18bo2bo24bo3bo$obob2o45b2obo$o 2bo50bo$o2bo8b2o$14bo4$15bo$14bobo$14bobo2$13b5o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 13 THUMBSIZE 2 ZOOM 8 ]]

Left: 90°. Right: 180°. (click above to open LifeViewer)

As the rulespace for this spaceship is large, various rules have different reflectors, including some with tiny stable ones, even dominoes.

All collisions of two 3-cell spaceships in Just Friends are shown below. The top section contains right-angle collisions, while the bottom section contains head-on collisions. There are 128 collisions total.

x = 424, y = 425, rule = B2-a/S12 80bo30bo30bo30bo30bo30bo30bo30bo30bo$78b2o29b2o29b2o29b2o29b2o29b2o29b 2o29b2o29b2o7$82b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o$84bo29bo 29bo29bo29bo29bo29bo29bo29bo21$80bo30bo30bo30bo30bo30bo30bo30bo30bo$ 78b2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o8$82b2o28b2o28b2o28b2o28b 2o28b2o28b2o28b2o28b2o$84bo29bo29bo29bo29bo29bo29bo29bo29bo20$80bo30bo 30bo30bo30bo30bo30bo30bo30bo$78b2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o 29b2o7$82b3o27b3o27b3o27b3o27b3o27b3o27b3o27b3o27b3o$84bo29bo29bo29bo 29bo29bo29bo29bo29bo21$80bo30bo30bo30bo30bo30bo30bo30bo30bo$78b2o29b2o 29b2o29b2o29b2o29b2o29b2o29b2o29b2o8$82b3o27b3o27b3o27b3o27b3o27b3o27b 3o27b3o27b3o$84bo29bo29bo29bo29bo29bo29bo29bo29bo20$80bo30bo30bo30bo 30bo30bo30bo30bo30bo$78b2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o7$ 82bobo27bobo27bobo27bobo27bobo27bobo27bobo27bobo27bobo$84bo29bo29bo29b o29bo29bo29bo29bo29bo21$80bo30bo30bo30bo30bo30bo30bo30bo30bo$78b2o29b 2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o8$82bobo27bobo27bobo27bobo27bobo 27bobo27bobo27bobo27bobo$84bo29bo29bo29bo29bo29bo29bo29bo29bo20$111bo 30bo30bo30bo30bo30bo30bo30bo$109b2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o 6$113bo29bo29bo29bo29bo29bo29bo29bo$114bo29bo29bo29bo29bo29bo29bo29bo$ 114bo29bo29bo29bo29bo29bo29bo29bo21$111bo30bo30bo30bo30bo30bo30bo30bo$ 109b2o29b2o29b2o29b2o29b2o29b2o29b2o29b2o7$113bo29bo29bo29bo29bo29bo 29bo29bo$114bo29bo29bo29bo29bo29bo29bo29bo$114bo29bo29bo29bo29bo29bo 29bo29bo105$32bo29bo29bo29bo29bo29bo29bo29bo29bo29bo29bo29bo29bo$30b2o 28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o7$45b2o27b 2o27b2o27b2o27b2o27b2o27b2o27b2o27b2o27b2o27b2o27b2o27b2o$44bo28bo28bo 28bo28bo28bo28bo28bo28bo28bo28bo28bo28bo21$2bo29bo29bo29bo29bo29bo29bo 29bo29bo29bo29bo29bo29bo29bo29bo$2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o 28b2o28b2o28b2o28b2o28b2o28b2o28b2o7$15b3o26b3o26b3o26b3o26b3o26b3o26b 3o26b3o26b3o26b3o26b3o26b3o26b3o26b3o26b3o$15bo28bo28bo28bo28bo28bo28b o28bo28bo28bo28bo28bo28bo28bo28bo21$2bo29bo29bo29bo29bo29bo29bo29bo29b o29bo29bo29bo29bo29bo29bo$2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o 28b2o28b2o28b2o28b2o28b2o28b2o7$15bobo26bobo26bobo26bobo26bobo26bobo 26bobo26bobo26bobo26bobo26bobo26bobo26bobo26bobo26bobo$15bo28bo28bo28b o28bo28bo28bo28bo28bo28bo28bo28bo28bo28bo28bo21$2bo29bo29bo29bo29bo29b o29bo29bo29bo29bo29bo29bo29bo29bo29bo$2o28b2o28b2o28b2o28b2o28b2o28b2o 28b2o28b2o28b2o28b2o28b2o28b2o28b2o28b2o6$16bo28bo28bo28bo28bo28bo28bo 28bo28bo28bo28bo28bo28bo28bo28bo$15bo28bo28bo28bo28bo28bo28bo28bo28bo 28bo28bo28bo28bo28bo28bo$15bo28bo28bo28bo28bo28bo28bo28bo28bo28bo28bo 28bo28bo28bo28bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 8 THUMBSIZE 2 ]]

Gallery of collisions (click above to open LifeViewer)

x = 44, y = 13, rule = B2-a/S12 35bo$33b2o$4bo$2b2o5$41bobo$41bo2$2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 8 THUMBSIZE 2 ]]

Of the 128 collisions, all but two die entirely, create a still life or constellation, or create a single outgoing spaceship. The two exceptions are shown here, one creating a p6 V-pentomino and the other a "big glider". (click above to open LifeViewer)