Designed expressly for use with one of our steam engines shown below, the Fantail Launch II is a great way to experience the fun of live steam power. Hull Length: 19, Beam: 7-3/4 inches, Scale: 1 inch = 1 foot (1/12). Power with Model VI Steam Engine (#82241) or Heritage Pre-Assembled Steam Engine (#82391). Required to complete: Two-channel radio, Model VI Steam Engine or Heritage Steam Engine. Midwest no. 958.