p44 piheptomino hassler
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p44 piheptomino hassler  
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Pattern type  Oscillator  

Number of cells  102  
Bounding box  31×44  
Period  44  
Mod  44  
Heat  93.3  
Volatility  0.91  
Strict volatility  0.80  
Discovered by  David Buckingham  
Year of discovery  1992  
 
 
 

P44 piheptomino hassler is a period44 oscillator discovered by David Buckingham on April 2, 1992.^{[1]} It was improved to the form shown here by Noam Elkies in April 1996. The oscillator consists of two piheptominos being hassled by two heavyweight emulators and four blocks. Buckingham used two copies of this oscillator to make the first period 44 glider gun. This became obsolete in October 1996 when Buckingham found a gun that only used one copy of the oscillator. In 1994 Dean Hickerson found a way to double the oscillator's period by adding two molds, creating the first period 88 oscillator.
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Categories:
 Patterns
 Oscillators with 102 cells
 Patterns with 102 cells
 Patterns found by David Buckingham
 Patterns found in 1992
 Patterns that can be constructed with 67 gliders
 Oscillators
 Periodic objects with minimum population 102
 Oscillators with period 44
 Oscillators with mod 44
 Oscillators with heat 93
 Oscillators with volatility 0.91
 Oscillators with strict volatility 0.80
 Patterns with bilateral orthogonal symmetry