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| {{Oscillator
| | #REDIRECT [[p29 pre-pulsar shuttle]] |
| |name = Pre-pulsar shuttle 29
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| |pname = prepulsarshuttle29
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| |f1 = Shuttle
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| |c = 54
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| |bx = 28
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| |by = 28
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| |p = 29
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| |m = 29
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| |h = 41.5
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| |v = 0.90
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| |discoverer = David Buckingham
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| |discoveryear = 1980
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| |rulemin = B3/S23
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| |rulemax = B3/S2378
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| |rulespecial = [[Conway's Game of Life|Conway Life]]
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| |isorulemin = B3-k/S23-ck
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| |isorulemax = B35ck6ek7/S234ckyz5kqr6ei78
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| |synthesis = 31
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| |plaintext = true
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| |rle = true
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| |animated = true
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| |apgcode = xp29_y8ca23z252y24eexcczg8gy28ssy366xg0s4z01y76e6x6e6w11zzy8252y1252
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| |pentadecathlonid = 54P29.1
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| |viewerconfig = #C [[ GPS 5 ZOOM 10 LOOP 29 ]]
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| }}
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| '''Pre-pulsar shuttle 29''' (or '''prime'''{{citation needed}}) is a [[period]] [[:Category:Oscillators with period 29|29]] [[shuttle]] [[oscillator]] discovered by [[David Buckingham]] on August 2, [[:Category:patterns_found_in_1980|1980]],<ref>{{CiteHickersonOscillators|accessdate=June 16, 2009}}</ref> making it the first oscillator of that period to be found. In terms of its [[:Category:patterns_with_54_cells|54]] [[cell]]s it is the smallest known period 29 oscillator.<ref>{{cite web|url=http://www.pentadecathlon.com/objects/class2/class2.php?part=3 |title=Class 2 Objects Catalog |accessdate=June 10, 2009}}</ref> The oscillator works by combining the 15-generation, two-[[tub]] pre-pulsar shuttle mechanism used in [[Eureka]] with a 14-generation pre-pulsar shuttle mechanism. [[hassle|Hassling]] pre-pulsars in this way was the only known way of constructing period 29 oscillators until the discovery of the [[p29 traffic-farm hassler]], and some variations of this shuttle are shown below. In September [[:Category:patterns found in 1994|1994]] [[Bill Gosper]] found that two copies of pre-pulsar shuttle 29 could be used to hassle a [[pentadecathlon]]. Gosper used it to construct the [[p58 toadsucker]].
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| A {{gliders|42}} [[synthesis]] is known for a variant of this oscillator, 56P29, which is shown below.<ref>{{CiteCatagolue|title=xp29_wgg0s4w255202552w4s0ggz320f811w4r4x4r4w118f023zzy4252y1252|page=object/xp29_wgg0s4w255202552w4s0ggz320f811w4r4x4r4w118f023zzy4252y1252/b3s23|accessdate=June 6, 2019}}</ref>
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| ==Image gallery==
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| {|
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| |-
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| |[[Image:Prepulsar29_gen4.png|framed|left|[[Generation]] 4 reveals two pre-pulsars (black) being hassled by a 15-generation mechanism (green) and a 14-generation mechanism (red).]]
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| |[[Image:Prepulsar29_v2.png|framed|left|A slightly larger version of this oscillator, 56P29, with just one pre-pulsar (black) and an alternate 14-generation stabilization (red)<br />{{JavaRLE|prepulsarshuttle29v2|brief}}]]
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| |[[Image:Prepulsar29_v3.png|framed|left|A much larger version of this oscillator with four pre-pulsars<br />{{JavaRLE|prepulsarshuttle29v3|brief}}]]
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| |}
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| ==See also==
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| * [[Pre-pulsar shuttle oscillators]]
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| ==References==
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| <references/>
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| == External links ==
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| {{LinkCatagolue|xp29_y8ca23z252y24eexcczg8gy28ssy366xg0s4z01y76e6x6e6w11zzy8252y1252}}
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| {{LinkCatagolue|xp29_wgg0s4w255202552w4s0ggz320f811w4r4x4r4w118f023zzy4252y1252|patternname=56P29}}
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| {{LinkPentadecathlonObject|54P29.1}}
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| {{Symmetry|diagonal2}}
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| [[Category:Sparkers]]
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| [[Category:Sparkers with period 29]]
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| [[Category:Strong sparkers]]
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| [[Category:Pre-pulsar shuttle oscillators]]
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| __NOTOC__
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