Carnival shuttle
Carnival shuttle  
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Pattern type  Oscillator  

Oscillator type  Shuttle  
Number of cells  43  
Bounding box  24 × 7  
Period  12  
Mod  6  
Heat  38  
Volatility  0.91  
Strict volatility  0.27  
Discovered by  Robert Wainwright  
Year of discovery  1984  
 
 
 

Carnival shuttle is a period12 oscillator that was found by Robert Wainwright in September 1984.^{[1]} The shuttle itself is a reaction between two ttetrominos, whose stability requires the suppression of one birth per period at both ends of the shuttle.
As shuttles can be placed head to head, it can be viewed as a finite segment of an extensible wick, and there are many ways to terminate this wick. The earliest version used middleweight emulators at the end, which got reduced to the much smaller monograms shown in the infobox. Other period4 sparkers including Tnosed p4 and blocked p43 work. More recent stabilizations include the stable beehive push catalyst by Tanner Jacobi in 2020^{[2]} and p3 pipsquirters by 83bismuth38 in 2021^{[3]}.
In addition to pushing a beehive, adjacent shuttles can hassle more complex components involving paired beehives, loaves or traffic lights (interchange). The interchange part emits domino sparks, which was used to create the first known nontrivial period24 oscillator, 186P24. The loafhassling reaction is similar to the catalyst in the stable twirling Ttetsons 2.
A collection of carnival shuttle reactions (click above to open LifeViewer) RLE: here Plaintext: here 
A 26glider synthesis for the infobox form was found by GUYTU6J on April 4, 2022. ^{[4]}
References
 ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
 ↑ praosylen (December 20, 2020). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
 ↑ 83bismuth38 (October 22, 2021). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
 ↑ GUYTU6J (April 4, 2022). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
External links
 Carnival shuttle at the Life Lexicon
 43P12.1 at Heinrich Koenig's Game of Life Object Catalogs
 Patterns
 Oscillators with 43 cells
 Periodic objects with minimum population 43
 Patterns with 43 cells
 Patterns found by Robert Wainwright
 Patterns found in 1984
 Patterns that can be constructed with 26 gliders
 Oscillators
 Shuttles
 Oscillators with period 12
 Oscillators with mod 6
 Oscillators with heat 38
 Oscillators with volatility 0.91
 Oscillators with strict volatility 0.27
 Patterns with bilateral orthogonal symmetry
 Flipping oscillators