Pre-pulsar shuttle 47

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Pre-pulsar shuttle 47
Pre-pulsar shuttle 47 image
Pattern type Oscillator
Oscillator type Shuttle
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

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