Pre-pulsar shuttle 29 (or prime) is a period 29 shuttle oscillator discovered by David Buckingham on August 2, 1980, making it the first oscillator of that period to be found. In terms of its 54 cells it is the smallest known period-29 oscillator. The oscillator works by combining the 15-generation, two-tub pre-pulsar shuttle mechanism used in Eureka with a 14-generation pre-pulsar shuttle mechanism. Hassling pre-pulsars in this way is currently the only known way of constructing period-29 oscillators, and some variations of this shuttle are shown below. In September 1994 Bill Gosper found that two copies of pre-pulsar shuttle 29 could be used to hassle a pentadecathlon. Gosper used it to construct the P58 toadsucker.
4 reveals two pre-pulsars (black) being hassled by a 15-generation mechanism (green) and a 14-generation mechanism (red).
A slightly larger version of this oscillator with just one pre-pulsar (black) and an alternate 14-generation stabilization (red)RLE: here
A much larger version of this oscillator with four pre-pulsarsRLE: here
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 16, 2009.
- ↑ "Class 2 Objects Catalog". Retrieved on June 10, 2009.