INVITED TO THE CASTLE…

INVITED TO THE CASTLE...When I opened this, the most usual door of the model apartment I was not in a normal hallway, and… However, in order. Inside the door was as if hammered together from thick oak, the dark time of the timbers, caught blued loops with zip ties. From the right of the entrance two narrow Windows streamed the light of day, Aza patterned glass lurks some kind of “medieval” landscape… In the wall between the Windows a mirror in a frame of beaten copper.

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RC ROCKET PLANE

RC ROCKET PLANEIn 1980, the sub-Commission on the rocket modeling of the FAI decided to introduce a new class of raketoplana S8E with a maximum mass up to 300 g engine with a total impulse of 40 n*S. Model of this class, created by Bulgarian athletes participated in the competitions and showed good results. Having the necessary materials, it is easy to make in the flying circle. The engine of rocket with a total impulse of 40 n*works for 10 s. To control the model can be used in compact radio equipment “Craft” or homemade equipment, the mass of which does not exceed 80 g. Usually its the power supply applies a battery capacity of 0.1 Ah and a voltage of 4.8 V.

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THE MODEL IS CONTROLLED BY LIGHT

THE MODEL MANAGES THE LIGHTThe electronic device described in mi readers, you can install on the toy, equipped with a separate drive for each caterpillar: tank, lunar Rover, Lunokhod. The model moves with headlights on in a darkened room, and set PA her the photodiodes capture the reflection of the headlights from obstacles. The appropriate commands to the drive engines on the basis of the received data takes the logical unit. Here’s how it works.

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ECONOMICAL WALL

ECONOMIC WALLEach individual Builder wants his house was not only beautiful it’s durable, but cheap. Design and materials of the walls is about a third of all costs. Is there the possibility of saving? I propose to make the wall monolithic, lightweight concrete-filled; the role of the formwork perform asbestos-cement sheets, they also then have to serve as a lining. The cost of these walls is lower than the brick, and the use of lightweight aggregates (sawdust, slag, reed) will improve their thermal insulation properties. In addition, they can be more subtle and light. In the end, will reduce transport and construction costs.

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UNIVERSAL RUBBER MOTOR

UNIVERSAL RUBBER MOTORStill, the vast majority of models of submarines with rubber motor class EL-500 (500 mm in length) are built on the same scheme. However, the adopted version with the detachable bow and stern parts of the hull has a number of disadvantages. No matter how carefully manufactured parts, the line connectors on the polished surface of “skin” still stand out, which spoils the appearance polyopia. Students involved in a circle of the second year (namely, they calculated the design of class-EL), not under force independently to build the model without the constant help of the leader of the group.

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“KALUZHANIN”: MICROTRACKER-UNIVERSAL

Regular readers of our magazine are already familiar with the Kaluga Amateur designer V. N. Arkhipov, author of easy and productive tillers (see “M-K” № 6, 1982). However, Valentin Nikolaevich considers that it is not so simple as it may seem: to walk on the plowed land, driving a two-wheel tractor and trailer at the same time, is quite tedious and is not for everyone. That’s why Arkhipov undertook the construction of a mini-tractor with four wheels that “ride” him: to various agricultural work, while not on m itself. The attempt failed, and the light appeared a kind of chair on wheels — tractor “Kaluzhanin-14”. Not so long ago, the author had submitted it to the popular TV show “you can” and received the approval of the competent jury Today at the request of viewers and our readers the journal publishes drawings on which you can build the same “iron horse” helper of your household and garden plots.

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