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M.S. Reyes Jr., A.R. Faburada, J.N. Francisco, A.C. Alvarez and M.A. Maulion

Objectives:. To improvise simple steam engines which operate almost exactly as how all steam engines work. To demonstrate how heat engines operate, specifically the steam engines.. METHODOLOGY . Materials: at least 2ft long of 1/8 inch in diameter copper tubingplastic bottle (for steamboat)al

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M.S. Reyes Jr., A.R. Faburada, J.N. Francisco, A.C. Alvarez and M.A. Maulion

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    2. Objectives: To improvise simple steam engines which operate almost exactly as how all steam engines work. To demonstrate how heat engines operate, specifically the steam engines.

    3. METHODOLOGY Materials: at least 2ft long of 1/8 inch in diameter copper tubing plastic bottle (for steamboat) aluminum cup aluminum soft drink can (for the rotary steam engine) cutter a pair of pliers.

    4. Procedure: STEAM BOAT Cut the plastic bottle in a half lengthwise. Estimate the height of the candle that it could fit into the bottle and stick it on the aluminum cup. Place it near the bow of the boat.

    5. Use a sticky tape to keep it in place. Gently bend the tubing around a large pen or pencil to form a coil in the center of the tubing. Using a nail, poke two holes at the back of the boat, then force the tubing through the holes.

    6. Gently bend the tubing so the coil is just over the candle flame. Fill the tubing with water by holding one end under the water and suck on the other end. Rest the boat in the water, letting both ends of the tubing under the water. Then light the candle.

    8. ROTARY STEAM Cut the aluminum soft drink can about 1/3 from the bottom to form a small cup. Carefully bend over the sharp end to form a neat and safe edge. Push the bottom part from the inside to form a bent in it.

    9. Punch two holes at the side of the can, opposite to each other. Place the candle in the center of the can then use a sticky tape to hold the candle in place.

    11. Insert the tubing in the punched holes. Bend the tubing into right angle or more but in opposite direction with each other.

    13. DISCUSSION the heat given off by the candle is absorbed by the tubing and later was transferred to the water inside the tubing. the water inside the coil boils thus the steam expands.

    14. the expansion of the steam is the one which is responsible in pushing the water out of the tubing. this enables the steamboat to move forward as well as this also enables the rotary steam boat to spin as what have been observed.

    15. the steam continues to expands, as this happens, the steam encounters the section of the tubing that used to be full of water. the moving back of the water into the tubing would cause the boat to move backwards as what had been observed in the part of the steamboat.

    16. the water does not go very far before it hits the end of the tube, any motion caused by the sucking of water is reversed by the water hitting the front of the tube (the coil) and pushing the boat forward again.

    17. RECOMMENDATIONS The researchers would like to recommend the use of other kinds of metal tubing such as aluminum tubing and brass tubing. We also recommend to use tubing with smaller or bigger diameter than what we have used.

    18. REFERENCES [1] Halliday, David, Resnick, Robert, et. al. Fundamentals of Physics, John Wiley and Sons Inc., New York, 2001, pp. 489 [2] Hewitt, Paul G., Conceptual Physics, Prentice Hall, Inc. New Jersey, 1992, pp. 361-363 [3]http://www.scitoys.com/scitoys/scitoys/thermo/thermo.html#rotary

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