Not so long ago in the journal “modelist-Konstruktor” was about the simplest model of a glider made from a conventional packaging corrugated Board material although not aeromodelling, but it is durable, tough and light. By the way, a square meter of corrugated Board with a thickness of 3 mm has a weight of only 400 g, respectively, the density of this material is only 0.13 g/cm3! Experiments have shown that the durable and lightweight corrugated cardboard is well suited for creating flying models. Needed only in the cutting and processing of corrugated Board to consider some of its features and to use a knife-cutter, literally honed to razor sharpness, otherwise cut lines get ragged.THE CORRUGATED BOARD MOTOR
Not so long ago in the journal “modelist-Konstruktor” was about the simplest model of a glider made from a conventional packaging corrugated Board material although not aeromodelling, but it is durable, tough and light. By the way, a square meter of corrugated Board with a thickness of 3 mm has a weight of only 400 g, respectively, the density of this material is only 0.13 g/cm3! Experiments have shown that the durable and lightweight corrugated cardboard is well suited for creating flying models. Needed only in the cutting and processing of corrugated Board to consider some of its features and to use a knife-cutter, literally honed to razor sharpness, otherwise cut lines get ragged.
Before you engage in the construction of microvesicle, I’ve been drawing various versions of its layout, trying on paper for all possible errors and miscalculations, which can only occur in the process. Looking ahead, it should be noted that designing on paper is one thing, fabrication is another. Many of the “roughness” out in the operation of the machine.
MODEL No. 1. This design is a continuation of work on improving the model, which is described in “M-K” (No. 1, 1972). For better aerodynamics it is applied to a fuselage of circular cross-section. The keel has a swivel mechanism to provide a forced descent. The screw diameter is increased to 556 mm, which contributes to the duration of the flight motor and improves the dynamic
Room models of small size. Simple in design and in manufacture. Material for their construction can serve as dry stubble and any weed, its structure is similar to a stalk of wheat. As the adhesive used enamel or plain nail Polish. Of tools enough to have scissors, pliers and a razor blade from a safety razor.
Electronic devices based on microprocessors and integrated circuits are less sensitive to the parameters of the supply voltage. To ensure the safe operation of these devices use voltage regulators with protection. In many power supplies is reduced to cut power to the circuit if a short circuit in it or a sudden increase in load current. Such, for example, the popular voltage stabilizers КР142ЕН5. 
