Pre-pulsar shuttle 47

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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 ]]
Pattern type Oscillator
Oscillator type Shuttle
Number of cells 84
Bounding box 31×30
Period 47
Mod 47
Heat 60.9
Volatility 0.89
Strict volatility 0.89
Discovered by David Buckingham
Year of discovery 1982

Pre-pulsar shuttle 47 is a period-47 shuttle oscillator discovered by David Buckingham on December 5, 1982[1] 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,[2] as shown below.

Image gallery

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


  1. Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
  2. "New Oscillators". H. Koenig (March 16, 2009). Retrieved on March 28, 2009.

External links

  • 84P47.1 at Heinrich Koenig's Game of Life Object Catalogs