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Column A may denote if the locomotive is equipped with PTC (Positive Train Control)
Still a WIP. The Following are color cordinated and listed as ->		YesNoUnknown(No recent Photos or Videos to indicate)Exempt (Mainly Yard switchers)N/A(Not needed)
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Column B will be to identify the locomotive and most recent paint scheme
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Column C is the Horn Type, with the primary identification of the horn along with the generation/casting/era the horn is, plus whether it's sick or not. If it has a strikethrough, this means the information is from the engine it was rebuilt from, IE SD40N info coming from an SD40-2, as no pictures or videos could be found of the newer engine
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Column D is the latest date we have information on the horn. This is very important, as horns can change on a moments notice.
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Column E is for the reversals of the bells eg K3LAR4 means the 4A bell is reversed or K5LAR24 means #2 and 4A are reversed. "All Bells Reversed" is abreviated as "ABR"
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Column F is for Arrangement and manifold. The first identification will be arrangement of the horn. More details to the right. The third is for what manifold it has, ie low, high, U, etcThe arrangement is what order the bells are in from the conductor side to the engineer side.K High Manifold Top left, bottom left, top middle, bottom right, top right in that orderK Low Manifold Pretty Straight ForwardP High Manifold, Top 2 bells, middle bell, bottom 2 bellsLeslie Manifolds Pretty Straight Forward
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Column G is for Horn Sickness. This specifies what bells are dead or if the horn is weak sounding or it's warbling. If nothing is wrong with the horn, it will be marked as normal. If there is no video of said horn, it will say unknown
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Column H is for where the horn is located on the engine. Most are located on the long hood of the engine these days, but some still retain them on the cab.
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Column I is for what type of bell is on the locomotive. More details to the right.EMD Steel bell is what used from 80s onwardOld GE Bell is what GE used up into the Dash 8 eraNew GE Bell starts from the Dash 8 era and goes into the 2000sGW E Bell are Graham WhiteTTI E Bell are Transtronic
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Column J is for any other notes about the locomotives not specifically relating to the horn including special paint jobs, former bells, engine names, etc.
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Columns K and onward will be used for any former horns the locomotive previously had and what years they had them.
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K Horn Types:
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K3LA/K3HA: 1 2 4A
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K5LA/K5HA: 1 2 3A 4A 5
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K5HL/K5LL: 1L 1 2 3 4
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K5LLA/K5HLA: 1L 1 2 3A 4A
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K5HLB/K5LLB/E: 1L 1 2 3B 4
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A Quick Crash Course on era/generation/cast identificationK3LP/K3HP: 1L 1 3B
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K3LB/K3HB 1 2 3B
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K Horns:K5L/K5H 1 2 3 4 5
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K3L/K3H 1 2 3
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WF = Wide Font, used in the 70s and 80s. Not very common these daysK5CA-LS 1L 1 3 3B 4 or 4a
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NF = Narrow Font, lasting from the 80s up until 2008K5UL-AU-LS 1 2 2 3B 4
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NF2 = Narrow Font 2000s (4A's and #4s were flat during this period)K5LLAB/K5HLAB 1L 1 2 3B 4A
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NF K3LA/K3HA EMD = Narrow Font K3LAs or K3HAs found on EMD engines during the 80s and 90s. These had sharper 4A bellsP Horn Types:
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RL = Raised Letter, the newest era starting from 2008 onwardsP3: 1 2 4
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P5: 1 2 3 4 5
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P Horns:P5a: 1 2 3 4A 5
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OC = Old Cast, made from the 1950s up to the late 1970s
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NC = New Cast, made from the late 1970s up through present day#1 #2 #3 were sharpened#5 was flattened
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MC = Mixed Cast
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Much thanks to the following people for helping with this list:
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Tommy McGowan
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Zack Bovitz
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Asa Wilcox
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Jack Carson
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JW Tish
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Sam Trzynka
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Railfaneric
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Chase Gilmore
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Gage Dameron
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John Gardner
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Larry Amaloo
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Gavin Akapo
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Matt Clough
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Hunter Evans
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Ben King
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Ryan Barrette
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Sean Clark
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And everyone who has videos used as sources. This list wouldn't be possible without the many, many videographers out there.
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