Dumas Jolly Jay Model Boat Kit The Dumas Jolly Jay is a great looking fishing trawler and includes items, such as mahogany plywood frames, balsa wood planking, pre-formed ABS plastic cabin parts, and complete drive line running hardware, including a 4.8 volt electric motor. Jolly Jay can be radio controlled with a two-channel radio or built for display only. Everyone is sure to enjoy the Jolly Jay. Model Specifications Length Overall - 24.ins (600mm) Beam - 8.5.ins (212mm) Scale - 1:30