BACHMANN GORDON THE BIG EXPRESS ENGINE #4 W/MOVING EYES. HO SCALEGORDON THE BIG EXPRESS ENGINE (WITH MOVING EYES) (HO SCALE) Performs best on 18" radius curves or greater. THOMAS & FRIENDS GORDON THE EXPRESS ENGINE w Moving Eyes HO Scale. Gordon is the No. 4 blue engine who pulls the express. As the senior member of the engine family, he is the fastest and most powerful of Sir Topham Hatt's team and he knows it. He's goodhearted, always willing to forgive, and uses his superior strength to help smaller engines out