Today, K-series horns are the most popular horns in North America, with the "K5HL" ( an "evolution" new GEVO horn) ,K3H, K3LA and K5LLA making up the majority of Train horns .

[5] The Evolution Series locomotives are some of the best-selling and most successful freight locomotives in United States history. These locomotives are equipped with Nathan Airchime K5HL horns, with the reversed 2 configuration, making a K5HLR2. The horns are mounted backwards with the 2 bell only facing forward and the 4 bells facing back.

2020年9月15日 · 2003 - 2-piece sandcast 1L bell introduced into mainstream use, notably for the K5HL GEVO horn. 2006 - Late 40Ks or 50Ks serial change to raised letter models (Airchime on bell sides as well as number).

2022年8月3日 · A UP Leading AC45CCTE GEVO K5HL 3rd Gen Horn With New SD70ACE Power A Manifest Train Northbound Thanks For Watching UP 5335...more

As posted earlier, The new K5HL "Gevo" horns have the new (by a year or so) Diecast #1L bell which voices a little different (nicer) than the older 2 piece Sandcast 1L. Its also rumored that Airchime is now checking each bell to make sure they are on key. Some or most of the older K5HLs do have bells that are off key. Thats why they sound so ...

Nathan K5HL Airchime Horn (3 Variants) New interior sounds including various switches, throttle and reverser movement sounds, internal relays, contactors and air sounds

For new locomotives, it's simpler to just specify a horn that's already been tested and found to comply. For GEVO's, that's the K5HL, a five chime horn on a high-mount manifold, three bells over two, with one bell pointing forward and four reversed: http://atsf.railfan.net/airhorns/k5hl.html

GE has almost exclusively used a Nathan K-5HL horn on US orders (and Canadian/Mexican orders that may operate in the US) since 2004 to meet Federal Regulation 49CFR229.129 regarding sound pressure level (SPL-in decibels or db) at 100 feet. EMD has been using a Nathan K-5LLA horn to satisfy the same requirement.

A UP Leading AC45CCTE GEVO K5HL Horn With AC44CWTE Power Thanks For Train Engineer Crew Wave Paper toilet Paper A Manifest Train Early Midnight Heading North...

2020年12月3日 · They’re not as evolved as the K5HL but both horns began to appear around 2004/2005. The K5HL became GE’s horn of choice for their gevo series while EMD chose the K5LLA for their SD70M-2/SD70ACe models.