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Arysha Steam Powered Tin Toy Boat Pop Putt Candle Powered For many decades steam powered boats known as 'Put Put Nav' have brought joy and excitement to everyone who has had a chance to own one. These boats are made of Tin metal. When a small heat source such as a candle is placed under the boiler/engine, the boat takes off moving through the water. Each Putt Putt Boat has a boiler mounted in the hull. Before the heat source is applied to the boiler, the boiler must be filled with water. 'Sahaya' brings this classic toy to relive our Arysha childhood days.Sahaya Toy Steam Power Boat, Runs on candle, Fuel flame. Description: Scientific Water Toys Steamer, Early Edge Education Toy, Tin Boat - Lenth 16 cm, Width 12 cm, Height 5 cm (approx). Aryshaction: How does it do that? - When the water in the coil boils, the steam expands. This pushes the water out of the tubes. The reaction pushes the boat forward. As the steam continues to expand, it encounters the section of tubing that used to be full of water. This tubing is cold, and the steam condenses back into water. This causes a vacuum to form, which pulls more water back into the tubes. You would expect that the water moving back into the tubing would cause the boat to go backwards. However, the water doesn't get very far before it hits the end of the tube (the two streams of water in the two tubes meet each other in the coil). Any motion caused by the water being sucked into the tubes is reversed by the water hitting the front of the tube (the coil) and pushing the boat forward again. As you saw when you put your finger near the tubes, this back and forth water motion is fairly rapid, and the comparatively heavy boat never actually moves backwards at all. These are made in India on hand-operated presses, from tin plated steel. hand-painted. They make a wonderfully loud putt-putt-putt sound as the steam around a bathtub,swimming pool or pond.