Scout-bomber P-Z. Created in the late 20-ies of the last century, the Soviet biplane R-5 construction.N. Polikarpov for several years was a classic type of reconnaissance aircraft. In the international aviation contest in 1930 in Tehran, which was attended by the best companies of England, France and Holland, our air reconnaissance took first place.
One way to reduce interference in digital circuits, as is well known, is to install the ceramic capacitors in parallel with the power rails. The closer to the contacts of the chip capacitor is, the more effective his work is.
The idea to use as a vehicle motor wheel is tempting. She became interested in members of the laboratory design of compact machines Cute Siberian branch of the USSR ninth-graders Sasha Titarenko and Vitaliy Molchanov. They were attracted by the compact device, no transmission and therefore no loss of mechanical energy in the intermediate links, that is, a higher efficiency motor wheel converting input electrical energy into mechanical energy and the transfer of the latter directly on the propeller — wheel.
According to the rules of the competition model rocket must use only during takeoff the thrust of a jet engine, and the descent of the lifting force of the aerodynamic surface. For performance of requirements it is desirable that during takeoff the shape of the model was close to the missile, that is, would have a minimum lateral area. This requirement is most fully correspond to the model raketoplana with variable wing geometry. Very promising, in particular, the use of all-moving front wing, which at launch is located along the fuselage and therefore has little effect on flight, and the transition planning rotated across, providing the necessary redistribution of aerodynamic forces.
In the third issue of our journal in 1968 published a description of the design of snake-gibralta for water skiers, created by the pioneer of this sport in the USSR — Alexander Casein. Over the years the enthusiasts of technical creativity — IV first skiers — produced a large number of these aircraft. Flying snake-gibralta for the boat or car for many has become a favorite form of recreation. There had also been a successful winter flying in the mountains. Muscovite M. Gokhberg, master of sports of water skiing, winter 1973/74 year was flying on a kite, accelerating on the ski slopes in the area Terskol in the Caucasus.
Svobodnaya “out of fashion”. Especially young modelers. What is the reason? Perhaps, in the length and lack of entertainment competition? And maybe the disadvantages of the method of manufacture of models of this type? In fact, if in the first year of studies in the clubs, build conceptual models, the second — planned complex fuselage model. That’s why the need to create a new expense of building a traditional class of models for modelers working in the groups the second year, is dictated by life itself.
The it equipment in the school yard does not present great difficulties and would not require much cost. Students are having such a station will be able to conduct geophysical or meteorological observation, and study various natural phenomena and their relationship. It will have to make only a few simple instruments and tools.
Say, in the Urals during the difficult years of chaos after the civil war an artificer built a car where everything was wooden, even the engine. However, if the wizard so the echo legendary as Leskov’s Levsha, here the use of wood instead of metal in the most important nodes in modern machinery: rolling mills, tractors, cranes, harvesters — not a legend, but a reality of our days.
“For the treatment of infield has decided to replace the tiller internal combustion engine electric. Already got polutoraterabaytny the motor. But it is three phase. How to connect to the network, where only one phase and “my best”?
Boeing Vertol Company was founded in August 1940 by F. PIASECKI, who became the chief designer and Chairman of the Board of the company. During her activities released more than 2,500 aircraft twin-screw longitudinal schema. The first helicopter of the company PV-1 single-rotor design was built in 1943. The first twin-screw PV-3 (prototype of future HRP-1 and H-21), designed by request of the U.S. Navy, took to the air in March 1945.