Spaceships
There are at least 5 natural oblique speeds, all of which involve interacting B-like engines with constant displacement (15,8) or (23,7).
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#C (15,8)c/600, 53 cells
x = 95, y = 32, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
93bo$92b3o2$90b3o$89b2obo$90b2o$91bo5$b3o$bo2bo$bo2bo$o3bo2$49bo$48b3o
$2bobo42bo2bo2$46bo2bo$46b4o$46b2o$46b3o4$73bo$74bob2o$73bob2o$73bo2bo
$73b3o!
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#C (23,7)c/832, 40 cells
x = 46, y = 40, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
42bo2bo$42bo2bo$42bob2o$42b2o12$20bo$20bobo$19bob2o$22bo$18bo$18bo2bo$
18b3o13$2b3o$ob2obo$2o3bo$bo2b2o$bo2bo$2b3o!
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#C (15,8)c/1064, 29 cells
x = 21, y = 43, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
19bo$19b2o$16b2obo$14b2obo$15b3o$16bo29$2bo$b3o$2bo$o3bo$o3bo$2bo$o$4o
$bo!
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#C (23,7)c/1200, 22 cells
x = 82, y = 71, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
3bo$2bo2bo$3bo$b3o2$4bo$o2bo$b3o60$79b2o$75bo3bobo$81bo$79b3o!
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#C (30,16)c/2032 = (15,8)c/1016 x2, 6 cells
x = 4, y = 4, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
b3o$o2bo2$2bo!
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x = 4, y = 39, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
bo2$o2bo$3o32$3o$o2bo2$bo!
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x = 6, y = 5, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
bobo$o2b2o$5bo$2b4o$4bo!
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#C c/2o
x = 38, y = 7, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
6bo13b3o11b3o$5b3o9bo2bobo2bo7bo2bo$2bo2bobo2bo5b3obobob3o6b2o2bo$b3ob
obob3o4bo9bo4bo4b2o$bo9bo3bob3o3b3obo3bobo2bo$ob3o3b3obo2bo11bo3bobo$o
11bo!
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#C c/3o
x = 46, y = 66, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
3b2o6bo$5bo3b2ob2ob2o14bo$b2o2bo2b2obo5bo11b3obo5bo$2o4bobo4bo2bobo9b
2o8b2obobo$bo3b4o7bob2o5b4o2bo3bo2bo2bo2bo$b3o2b2ob2o5b2o2bobo4b3o5bo
6bo2bo$3bob3o2bo7b2ob2ob3obo8bobob2obo$3bo2bo15bo2bo5b3ob6o2bo$3b5obo
14bo3b2o6b3o$5bo18bobo$9bo3$3b2o6bo15bo2b2o$5bo3b2ob2ob2o8b3ob3o$b2o2b
o2b2obo5bo7bo$2o4bobo4bo2bobo7bo$bo3b4o7bob2obo4b2o3bo$b3o2b2ob2o5b2o
4bo7b2o$3bob3o2bo7b3o4b2o3bo$3bo2bo13bo3bo$3b5obo8b2obo7b2o$5bo13b2ob
2o2b4o$9bo11bo5b2o3$3b2o6bo$5bo3b2ob2ob2o$b2o2bo2b2obo5bo$2o4bobo4bo2b
obo13bo3bo$bo3b4o7bob2obo5bo2b2o2b2o2bo$b3o2b2ob2o5b2o7b2ob2o4bobob2o$
3bob3o2bo7b3o3b2o2bo2b3o$3bo2bo13bobo3bo$3b5obo14b5o$5bo16b2o3bo$9bo
15b3o$25bo3$3b2o6bo$5bo3b2ob2ob2o$b2o2bo2b2obo5bo$2o4bobo4bo2bobo$bo3b
4o7bob2obo$b3o2b2ob2o5b2o4bo$3bob3o2bo7b3o5bo$3bo2bo13bo3b2o$3b5obo8b
2obo4bobo$5bo13b2ob2o4bo$9bo11bo4b2o$28bo3$3bobo$b2ob3o$2obobo$bo3bo$b
o3bo$2bo2b3o$9bo$2b2o2b2ob2o$b3o$bo4bo$b5o$3bobo!
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#C c/4o
x = 44, y = 62, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
2b2o$3o3bo3bo25b3obo$o4b2o4b2o9b5o9b2o3b2o$bo6bo2bo2bo7bo2b3o2b3o2bo5b
3o$obo8b2ob2o5b4ob3obob2o7b2o$o13b2obo13b2o$3o10bo5bobo$3o10bo5bobo$o
13b2obo13b2o$obo8b2ob2o5b4ob3obob2o7b2o$bo6bo2bo2bo7bo2b3o2b3o2bo5b3o$
o4b2o4b2o9b5o9b2o3b2o$3o3bo3bo25b3obo$2b2o3$7bo$2b2o2bo2bo3b2o9bo2bo$
2bob2o3b3o2bo8b5obo$2bo5bo2bo3b2o$b2o9bo4bo4b3o2b2ob3obo$bo11bo2bo5b2o
8bob2o$2ob2o10b2o2bobo3bo6bo3bo$2ob2o10b2o2bobo3bo6bo3bo$bo11bo2bo5b2o
8bob2o$b2o9bo4bo4b3o2b2ob3obo$2bo5bo2bo3b2o$2bob2o3b3o2bo8b5obo$2b2o2b
o2bo3b2o9bo2bo$7bo3$7bo$2b2o2bo2bo3b2o$2bob2o3b3o2bo9bo$2bo5bo2bo3b2o
11bo$b2o9bo4bo4bobo2b2o$bo11bo2bo7bobo$2ob2o10b2o2b5o4bo$2ob2o10b2o2b
5o4bo$bo11bo2bo7bobo$b2o9bo4bo4bobo2b2o$2bo5bo2bo3b2o11bo$2bob2o3b3o2b
o9bo$2b2o2bo2bo3b2o$7bo3$7bo$2b2o2bo2bo3b2o10b2o$2bob2o3b3o2bo8bo$2bo
5bo2bo3b2o5b2o3bo$b2o9bo4bo9b2obo$bo11bo2bo3bo7bo$2ob2o10b2o2bo$2ob2o
10b2o2bo$bo11bo2bo3bo7bo$b2o9bo4bo9b2obo$2bo5bo2bo3b2o5b2o3bo$2bob2o3b
3o2bo8bo$2b2o2bo2bo3b2o10b2o$7bo!
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#C 2c/5o
x = 34, y = 45, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
2b2obo$2bob2o3bo$bo6b3o2bo$o2bo3b2ob2o5bo$o2bo3b2o8bobo3b2o3b3o$bo6b4o
b3o7bobo2b3o$2bob2o3bo5bo4bo2bo4b4o$2b2obo7bo4b4o2b3o$10bo6b3obo10bo$
11b3o4b2o2bo10bo$11b3o4b2o2bo10bo$10bo6b3obo10bo$2b2obo7bo4b4o2b3o$2bo
b2o3bo5bo4bo2bo4b4o$bo6b4ob3o7bobo2b3o$o2bo3b2o8bobo3b2o3b3o$o2bo3b2ob
2o5bo$bo6b3o2bo$2bob2o3bo$2b2obo4$5b2o$3bob2o3b2o$4o3bob4o$o4bobo4b2o$
o6b2obobo2b2o$4bo5b2ob2o$o2bo8b2o$o$2obo$2bo$3bo$3bo$2bo$2obo$o$o2bo8b
2o$4bo5b2ob2o$o6b2obobo2b2o$o4bobo4b2o$4o3bob4o$3bob2o3b2o$5b2o!
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#C c/5o
x = 6, y = 9, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
b2o$bo2bo$o3bo$3o2$2b2o$b2o2bo$2bo2bo$2bo2bo!
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#C c/5d
x = 28, y = 28, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
3bo$b5o$bo3b2o2b2o$2o3bo3bo2bo$bo2bobo2b3obo$b3o10bo$2bobobo2bo4bo$8bo
bo2bobo$7b2obo2b2obo$2b3obo4b2obobo$2bobo2b2o$4bo4bo7b2o$3bo5bo8b2o$4b
o2b2o10bobo$5b2ob2o$7bo13bobo$8b2o13bo2bo$11bo13b3o$11b2o$12b2o2$13bob
o2$15b2o2$17bo$16b2o$17bo!
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#C c/6d
x = 42, y = 42, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
5b2o$4bob2o$3b3obo$b2obo$bo$5b3o5bo$3o2bob3ob3o$bo4bo5bo$3bo3bo2b2o3bo
$7b2o5bo$7bob2obo$6b2o2bo4b3o$9b2o3bo2bo$6bo3bo6bo$6b3obo2b2o2b3o$7bob
3o2bo4bo$8bo6b2ob2o$11bo4bo4b2o$11b3ob2o5bo$11bobobobobobo4b2o$17bo3bo
2bo2bobo$17bo5b4obo$17bo3bo6bo$17b2ob2o5b2o$18bo2bo$21b2o3b3o$21b2o2bo
3bo$19bo2b3obo2b2o$19b2o5b2o$20bobo3bob2obo$24bo$28bo2bo2bo$28bo3b2o$
29b2obo2bo$31b2o2bo3b2o$33bobo2bob2o$38b2obo$36bobo$35b2o$35bo$34b2o$
35bo!
There are several high-period oscillators using a B-like mechanism:
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#C p272
x = 19, y = 6, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
bo15bo$2o15b2o$bob2o9b2obo$3bob2o5b2obo$3b3o7b3o$4bo9bo!
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#C Smallest known of several p368
x = 59, y = 39, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
b3o$3o$o$bo2bo$b3o9$43b2o$42bo4$56b3o$54b3obo$55b3o14$14bo$13bo3bo$13b
o2b2o$13b2ob2o$15b2o!
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#C Symmetric p368
x = 70, y = 29, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
16bo$15b2o$16bob2o$18bob2o$18b3o$19bo5$66bo$66b3o$67bobo$66bo2bo$3obo
60bob3o$o2bo$obo$b3o$3bo5$50bo$49b3o$48b2obo$50b2obo$53b2o$53bo!
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#C p832 (matches one of the spaceships)
x = 25, y = 27, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
23bo$24bo$21bo2bo$23b2o17$3b3o$5bo$3o2bo$o$2ob2o$2b2o$3b2o!
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#C p1296
x = 34, y = 20, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
bo2$o2bo$3o13$31bo2$30bo2bo$30b3o!
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x = 41, y = 113, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
6bo2b2o3b2o3b2o2b2o4bob2o3b2o$10bo3bo4bo3bobo3b2obo2bo2bo$10b2o4bo3bo
4bo5bo3b2obo$6bo8b2o2b2o4b2o4b2o4bo$37b2o2$6bo3b2o3b2o5b2ob2o2bobo$9bo
2bo2bobo4bobobo2b3o4bobo$9bo2bo4bobo4bo11b3obo$6bo3b2o6b2o4b2o5b3o5b2o
$31bobo4bo$38b2o$6bo8$o2bo2bo8b2o11b2o$9b3o3bobo3b3o4bo$10b3o5bo3bobo
4bo$6bo10b2o4b3o4b2o$33bo$32b2o$o2bo2bo10bo$9b4o3bobo5bo$9b4o3b3o4b2o
3b2o2b2o$o15bobo4b2o4bo3bo$17bo4bo6b2o2b2o$25bo$o2bo2bo16b2o8$o2bo2bo$
9b2o8b2o$10b2o6b2obo$6bo5b2o4bob2o$13b2o4b2o2$o2bo2bo3$6bo3$o2bo2bo8$o
5bo4bo5b2o$10b5o2bobo$11bo$o5bo12bobo$20b2o2$o2bo2bo3$6bo3$6bo8$o2bo2b
o3$o3$o2bo2bo3$6bo3$o2bo2bo8$o2bo2bo11b2o$10b2o5bo$11b2o4bobobo$o20bo$
11b2o6b2o$12b2o$o2bo2bo3$o5bo3$o2bo2bo!
Some small vanishing patterns:
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x = 39, y = 4, rule = B2in3-ekny4kt5ery6cin7c8/S2aek3-ace4eiyz5eik6-ck7e8
o2b2o2bo3bobo2bo4b2o3bo3bobo3bo$8bo3bo4bo3b2o2bobo3bo3bobo$18bo7bo3bob
o3bobo$37bo!