No, it’s not helicopters. Speech will go today about snakes. You ask: can l find something in common between these very different devices? It is possible… the fact that the serpent flies by created any element of the lifting force, be it habitual plate, box frame, covered with paper, or something else. In short — you need a lifting force. And for its creation can be as “something else” to come and propeller similar to a helicopter, or the wheel of Magnus. What kind of wheel? Explain in more detail.
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Lovers of travel and tourism would like to take your small child. But kids can’t walk: because when an adult makes a single step, they take three and get tired quickly. However, if the Pope on the back will carry the baby in a comfortable “chair”, then the family can decide on a long journey. In attached, like a backpack, the lightweight seat made of thick cotton material, you can carry a baby weighing up to 20 kg.
When working with metal often must bend, to stamp, to pull from sheet materials of different parts, figure out, puncture, cut them all kinds of holes. Such operations are performed with a press and set of dies. However, the study of the hydraulic press, commonly used for this purpose, has drawbacks: it is impossible to work with sheet material wider than 80 mm, it has no reverse enhanced speed, and the speed of movement of the piston is small. In addition to fixing tools special tools.
One of the interesting types of competitions rocketmodeler are launching models — a kind of miniature missiles. In the sporting code of the FAI and our “Rules”-models are represented by two categories S5 and S7 — for the height and realism of flight. Today our story is about a high-rise copies.
Modern small apartments have to “measure seven times” before it to arrange the furniture. In the nursery the more. One solution is to use furniture combines, for example, such as in the figure. In the daytime, it serves as a table, and it is possible to prepare lessons, and at night transformirovalsya in a sofa bed. Multifunctional furniture of this type is distinguished by compactness and simplicity. For its production does not require scarce materials, it does not contain complex assemblies. The first option universal furniture combine harvester consists of two main pillars-boards connected by a top horizontal shelf Board. Behind them are attached sheets of plywood or hardboard: they give rigidity and stability of the structure.
For many of my peers postwar truck ZIS-150 are associated with the period when in Moscow and other cities turned to mass construction of the famous five-story Khrushchev. Thousands of trucks on the basis of these machines was delivered to the construction site concrete, many truck tractors with a bulky semi — wall panels, and side cars and other cargoes, including people, which at that time was not forbidden by the rules of the road. By the way, in those years truck mixers-mixers we have not been, and to the concrete prematurely seized, the trucks had to navigate city streets with great speed, generously spilling the contents of the body.
