Every year with the arrival of winter in edition beginning to receive letters in which readers expressed legitimate confusion about unreasonable, in their view, the energy consumption of household refrigerators. Indeed, at a time when the window — bitter frost home refrigerator with a rumbling absorb all the new kilowatt hours of electricity to lower the temperature inside the refrigeration Cabinet two to five degrees Celsius and inside the “freezer” — to minus ten or fifteen. However, today few people remember that in the houses built before the war in the kitchens was located built-in wardrobe-fridge, which is a niche in the outer wall, which with a few holes communicating with the outside air and had a thick door with insulation. Of course, this refrigerator was not very reliable: when you thaw frozen foods melted, and in extreme cold turned into ice blocks that freeze should not.
NEED A REFRIGERATOR?
The popularity of not so long ago, the class of boat Hydro n today remains very high. In some Western countries, interest in new high-speed gliders eclipsed hobby other RC models. It’s not so strange. In established sports school a professionalization of equipment, and the average Modeler has become extremely difficult to compete with the masters. A class “Hydro” up to the present time the design of the glider remained simple n easily replicable. Attractive another factor. The fact that the average speed “Hydra” (about 100 km/h!) two times higher than any other boat. Of course, once you try to control such appliances, few people will want to come back to “snail”. Race track is very simple (oval, around two “pylons”), In one race at the same time involved up to five athletes. This increases the intensity and passions of sports and entertainment competition. By the way, even the simplified system of reckoning. No tables for specific speeds or seconds. The winner of each race gets the maximum number of points, and each subsequent participant, the corresponding place in the race.
With a minimum of welding operations, avoiding difficulties of manufacturing in more modest circumstances than the school shops complex assemblies and precision parts to make your tractor versatile — such a task put before him a young technology under the guidance of teacher work secondary school number 3 g. Vyatskie Polyany N.
After reading in the “M-To” article V. Sedov, “the Trailer for “Jupiter” I thought that the exchange of experiences, ideas and technical solutions encourages and facilitates the work of Amateur designers. Perhaps my thoughts and study will interest readers, come across them on new interesting solutions or at least will help in the technical work.
What is usually associated the term “straight-through”? Of course, with aircraft jet engines to achieve the highest supersonic speeds. And how can become a propulsive ship …? This is what we tell you today. “The heart of The engine,” the proposed mikrosudna is an unusual device, based on the principle of action on convection. Recall that a similar effect is found in the use of liquid cooling devices of some automobile engines ( “Trabant” and others). On these machines, the water circulates independently, as warmer tends to rise up and fall down cold. Thus the cooling system of “pumping” water without using any pump.
When designing equipment for the new sports season to our members once again raised the question of finding a middle ground between championship superparty and sverhpredelna models for beginners.
It just so happened that the car in our country is becoming less of a means of transportation and all more luxury. Accessibility for a person of average wealth — not a speculator, not a businessman, not a banker close to zero. Those hundreds of thousands of rubles, I ask today for any car, not save any “works righteousness”.
In the early 70-ies I happened to be a member of origin in the country of Windsurfing. In those years, sailing enthusiasts Board has high hopes for its extensive and widespread, but, unfortunately, a truly massive this sport did not, although the number of adherents of the sail increased significantly over the past two decades.
