Pi ship 1
From LifeWiki
Pi ship 1  
View static image  
Pattern type  Growing spaceship  

Number of cells  452  
Direction  Orthogonal  
Front period  18  
Front speed  c/2  
Back period  30  
Back speed  3c/10  
Discovered by  David Bell  
Year of discovery  Unknown  

The pi ship is a growing spaceship which relies on the reappearance of the piheptomino 30 generations through its evolution. Mike Beeler showed in Lifeline Volume 4 that a pair of blocks suppresses the pi's selfdestructive exhaust and allows the reincarnated pi to evolve again, nine cells further forward. These blocks can of course be laid down by a puffer, and that puffer is the front part of the pi ship.
External links
 Pi Waves and Pi Tracks at Game of Life News