Twin bees shuttle
Twin bees shuttle  
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Pattern type  Oscillator  

Oscillator type  Shuttle  
Number of cells  28  
Bounding box  32×13  
Period  46  
Mod  46  
Heat  32.5  
Volatility  0.98  
Rotor type  Twin bees  
Discovered by  Bill Gosper  
Year of discovery  1971  
 
 

The Twin bees shuttle (or Bheptomino shuttle^{[1]}) was found by Bill Gosper in 1971.^{[2]} Before discovery of the snark, it and its variants were the basis of all known period 46 oscillators (the version at right being the smallest based on its minimum population of 28 cells), and are still so of all known true period 46 guns, including the second known basic gun, new gun 1. The simplest such gun is the bigun, in which two twin bees shuttles collide with each other headon (much like the collision of two queen bees in the Gosper glider gun).
There are numerous ways to stabilize the ends, two of which are shown to the right; a stabilization by two blocks on the left of the pattern, and a stabilization by one block on the right. This latter method produces a very large spark which is useful in a number of ways. For example, the large spark can be used to convert an incoming glider into a lightweight spaceship, as illustrated by double X. The image below shows David Bell's double block reaction (on the left), which results in a shorter but wider shuttle than usual, as well as Heinrich Koenig's hat stabilization (on the right).
Interactions based on the twin bees shuttle are numerous and can have many applications. Some notable reactions are period 46 oscillators that can directly reflect gliders, lightweight spaceships, and middleweight spaceships, as well as convert gliders to lightweight spaceships and lightweight spaceships to middleweight spaceships.
The period92 doseedo reaction was found by David Bell in 1996.^{[3]} It is a 90 degree glider reflection reaction in which the gliders appear to circle around each other.
Image gallery
See also
References
 ↑ "Bheptomino shuttle". The Life Lexicon. Stephen Silver.
 ↑ Dean Hickerson's oscillator stamp collection.
 ↑ "Doseedo". The Life Lexicon. Stephen Silver.
External links
 Twin bees shuttle at Eric Weisstein's Treasure Trove of Life
 Twin bees shuttle at the Life Lexicon
Catagolue
 cistwinbeesshuttle at Adam P. Goucher's Catagolue
 transtwinbeesshuttle at Adam P. Goucher's Catagolue
 3block twinbees shuttle at Adam P. Goucher's Catagolue
 xp46_330279cx1aad3yd66zx4e93x855bcy8cc at Adam P. Goucher's Catagolue
 Patterns that can be constructed with 8 gliders
 Patterns
 Oscillators
 Patterns with 28 cells
 Oscillators with 28 cells
 Shuttles
 Oscillators with period 46
 Oscillators with mod 46
 Oscillators with heat 32
 Oscillators with volatility 0.98
 Oscillators with rotor Twin bees
 Patterns found by Bill Gosper
 Patterns found in 1971
 Sparking oscillators
 Domino sparkers