The American Diesels are diesel shunters who live and work in the United States of America.


Thomas & Friends

One of these diesels was seen pulling a goods train through Arizona, where she nearly collided with Thomas, Ace and Nia when they were rolling backwards down the Morenci Loop. Nia apologised to her, but the diesel reassured her that she was fine before the engines then set off again and parted ways.


Two diesels were later seen pulling and shunting trucks at the San Francisco Docks. It is unclear whether or not one of them was the same one Thomas, Ace and Nia met.

Technical Details


The American Diesels are based on the Hudswell Clarke 0-6-0 diesel shunter which worked at the Manchester Ship Canal. No. 4002 Arundel Castle, affectionately known as "Billy", is preserved in working order by the East Lancashire Railway Diesel Group. Sister locomotive No. 4001 Alnwick Castle is also preserved as a static non-operational exhibit at the Winfields Store site at Rising Bridge. Frankie is another member of this class.


The American Diesels are painted blue and orange with gold lining.


Voice Actors

Audio Files


First used Last used Sound Effect
Big World! Big Adventures! Active
Generic American Horn


  • Their models are reskins of Frankie.
  • One of them shares the same horn sound as Mavis.


Thomas & Friends

CGI Series

Behind the Scenes

International Characters

* RWS only | ** T&F only | ✦ Changed location
*Disclosure: Some of the links above are affiliate links, meaning, at no additional cost to you, Fandom will earn a commission if you click through and make a purchase. Community content is available under CC-BY-SA unless otherwise noted.

Fandom may earn an affiliate commission on sales made from links on this page.

Stream the best stories.

Fandom may earn an affiliate commission on sales made from links on this page.

Get Disney+