The p50 glider shuttle is a period-50 shuttle oscillator found in its original form by Dean Hickerson on March 3, 1992 and was the first period-50 oscillator to be discovered. Its original form used an early version of toaster and was based on a period-66 oscillator discovered by Robert Wainwright in September, 1984. The oscillator works by using two copies of eater 3 and four copies of a period-5 sparker found by Noam Elkies to shuttle two gliders back and forth. By increasing the distance between the two reflectors, oscillators of periods 50 + 40n can be created. In March, 1992 Hickerson created a related oscillator by crossing two pairs of gliders using rephasers, which allowed the construction of oscillators of periods 230 + 40n.
A related p230 oscillator discovered by Dean HickersonRLE: here
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on July 21, 2010.