3741 Large Locomotive is a MY own TRAIN set released in 2001. It is a steam locomotive that can be built in two configurations. The first configuration is a large tank engine, with onboard water tanks, a cab with entrance cutouts on the sides, and a coal bunker at the end. The second configuration has no such tanks or bunker, and is open at the back instead to link up with 3742 Tender to create a tender engine.