P47 pre-pulsar shuttle

Pre-pulsar shuttle 47
x = 30, y = 31, rule = B3/S23 12bo4bo$10b3o4b3o$9bo10bo$9b2o8b2o2$7bo14bo$7bo14bo$7bo6b2o6bo$14b2o2$ bo26bo$obo3b3o12b3o3bobo$bo4bobo12bobo4bo$6b3o12b3o4$6b3o12b3o$bo4bobo 12bobo4bo$obo3b3o12b3o3bobo$bo26bo2$14b2o$7bo6b2o6bo$7bo14bo$7bo14bo2$ 9b2o8b2o$9bo10bo$10b3o4b3o$12bo4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
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Pattern type	Shuttle Oscillator
Number of cells	84
Bounding box	31 × 30
Period	47
Mod	Unknown
Heat	60.9
Volatility	0.89
Strict volatility	0.89
Discovered by	David Buckingham
Year of discovery	1982
Pattern files Plaintext prepulsarshuttle47.cells RLE prepulsarshuttle47.rle

Pre-pulsar shuttle 47 is a period-47 shuttle oscillator discovered by David Buckingham on December 5, 1982 and was the first oscillator of that period to be discovered. It consists of four tubs, four blinkers, four eater 1s and two blocks hassling two pre-pulsars. Hassling pre-pulsars in manners similar to this had been the only known method of constructing period-47 oscillators until discovery of the snark. In terms of its 84 cells, it is the smallest known period-47 oscillator.

In May 2003 Jason Summers found that sparks from four copies of this oscillator could be used to support a period-47 t-tetromino engine, and in February 2009 Nicolay Beluchenko noticed that this only required two copies of the oscillator, as shown below.

Image gallery

File:Prepulsar47 gen4.png Generation 4 reveals that the objects being hassled are pre-pulsars

An extended version of this oscillator, found by Jason Summers and improved by Nicolay Beluchenko Download RLE: click here

See also

• Pre-pulsar shuttle oscillators