Steam engine on a ship. Drawing, description

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Steam engine on a ship. Tips for a modeler

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Anyone who has made model ships with electric drive is familiar with the problems associated with power supplies. You have to replace batteries often, but they are not cheap at all. Hence the continued interest that modellers show in the idea of replacing the electric drive. For example - on... a steam one, which does not require any power supply to operate.

I think I was lucky: while leafing through library files of magazines, I miraculously came across an article."Steamer with a candle", published in No. 8 of "Model Designer" for 2000. However, I did not blindly copy the technical solutions presented there. And the specific conditions, materials and equipment at my disposal required a slightly different approach to the implementation of the conceived idea - the installation of an improved steam engine for a model of a coast guard boat.

Steam engine on a ship
Steam jet engine on a model of a coast guard boat (the chimney is not shown): 1 - hull of the boat model; 2 and 12 - main and additional boiler rooms; 3 - ring conduit; 4 - wick; 5 - firebox; 6 - steam line; 7 - rotary nozzle; 8 - fluoroplastic bushing; 9 - steering device; 10 - heat-insulating shell (a tin can lined with asbestos on the inside, with an upper rectangular opening for the chimney and round lower ones for supplying fuel with subsequent air flow); 11 - boiler; 13 - waterline; 14 - additional boiler; knot since years. 3,6 and 11 (assembled) - from the motor-compressor of a domestic refrigerator.

Like the prototype described in the magazine, the engine I propose contains a steam injection line. But it is connected to the top of a real, not a pseudo-boiler. The boiler must be equipped with a heat-insulating shell.

Sea water is supplied to the boiler from below using a ring water conduit and heated to a boil by the flame of a candle (lamp) installed in a kind of firebox. The resulting steam enters the discharge steam line, which ends under the bottom of the stern, in place of the propeller shaft. The ship moves due to the reactive energy of a jet of steam escaping from the outlet of the steam line and directed into a rotating nozzle controlled by a steering device.

For stable operation of such a system, the following conditions must be met. The suction end of the water pipe is located 30-40 mm below the exhaust end of the steam pipe. The lower third of the boiler should not be above the waterline. It is highly desirable that the diameter of the water pipeline be half that of the steam pipeline.

A ready-made “steam boiler” with tubes can be found if you open the motor-compressor housing of an old refrigerator. What is to become a conduit must be bent into a ring, and the end brought under the keel. The cistern-boiler will hang securely on this ring and a tin lid - a firebox with a candle (lamp) - will be conveniently placed.

A tin can will serve as a convenient blank for the boiler shell if it is covered from the inside with sheet asbestos. The latter must be fastened to a tin base with wire and impregnated with liquid glass (office glue). In the shell, it is necessary to prudently make an upper rectangular hole for the chimney, as well as several round lower ones - for supplying fuel and subsequently ensuring air flow. The stable burning of a candle in the firebox is ensured by a non-falling wick - a strip of dense cotton fabric stitched with steel wire.

To adjust the course of the steamer, do not be lazy to make a steering device with a rotating nozzle that controls the jet stream.

The design of the model allows for its further improvement. With the appropriate skill, you can, for example, install a second steam boiler, especially since the corresponding compartment for it is already provided in the model. True, the rotating device then needs to be installed on each nozzle.

Well, if you equip such a homemade product with, say, a mainmast, a mizzen mast and a hanging keel, then you can get a lot of pleasure from an unusual model of a sailing-steam-jet vessel.

Author: V.Zorin

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