Sam is based on the Virginia Railway's Blue Ridge 2-6-6-6 class. Weighing 389 tons, Sam is a super-sized and super-strong locomotive. He works on the aforementioned Virgina Railway, using his great strength to pull long freight trains and deliver heavy materials. He once visited the Island of Sodor to help in the construction of the history museum.
Sam is strong and mighty, with a warm and friendly heart towards others. However, he occasionally uses his size to intimidate smaller engines.