ON THE “TRAMP” – IN CYCLING

Our family vehicle — a three-wheeled velotandem “the Vagabond” — designed by me for tours. From the same konstruktsii it is distinguished by the absence of any irreversible modifications to the basic bike on the basis of which created velotandem; ease of fabrication of additional parts and components which couple to the standard model turns into a three-wheeled trailer, as well as high reliability “Tramp” tested tough operation on the roads of Russia.
Like all tandems, our also has a smaller in comparison with a pair of conventional bicycles CX — the drag coefficient and, as a consequence, a lower sensitivity to the counter air flow. All of this allows easily for 4…5 hours to maintain a cruising speed of about 20 km/h (7 km/h uphill and 80 km/h on Sunnah). To resume movement, as experience has shown, it only takes two or three hours of rest, although the crew does not have high athletic qualities.

UNIQUE ROCKING

UNIQUE ROCKING CHAIR

One of the most important components of the control system with cord model airplane rocking chair that serves as the connecting link between the cord strands and rods for the rudders. Structures of these nodes knows a lot. But, in fact, all of them are divided only into two groups — classic rocking and disk. Both traditional schemes has its own inherent flaws. Thus, the conventional rocking chair in connection with a change in angle relative to the direction of cords in its turn has a variable gear ratio. In addition, this system takes a lot of space in the model, and at large the required control effort, the scope of the rocking becomes so significant that the node weight begins prison the cable that connects the two kordovye threads, thrown through the simple pulley, the diameter of which is limited only by the flexibility of the cable used. The rope on the pulley is not fixed and can therefore drag-and-dropped in the model for the entire length on both sides. One arm cable half-ring is attached to the sealing, which holds one of the levers easy simple politically. If you carefully consider the principle of operation of the new system, it will be clear that the selection of parameters politically fails to provide any parameters of the control system as a whole. It seems that unique rocking chair has no weaknesses.

SKINS TO CHOOSE FROM

One of the tips you have offered a convenient method of attachment of sandpaper to the sanding block rubber ring. I began to strengthen them not only one skin, but two: one side of the bar — fine, with another — rough, for initial processing. It was very convenient. Yu BADJUKOV, Vorkuta

Start over

Start overEasy to fly model aircraft. I want to offer young readers with “M-K” unpretentious three models, the design of which worked at the Center for Children’s technical creativity of the city Staraya Russa, where I work as the head of the model aircraft association. Drawings and diagrams allow a few hours to make good flying models, using quite affordable materials and simple tools. An important advantage of the proposed designs is that they can be run not only outdoors, but also indoors – in a school gym or in the hallway.

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DEL’TALET NEW GENERATION

DEL'TALET NEW GENERATIONThis small aircraft drew more attention to themselves at the Tushino international salon in June 1995. It differed from other such somewhat unusual layout. In conversation with its creators revealed that this design decision was made as a result of deep theoretical and experimental work conducted by the authors in the field of aerodynamic interaction of the wing and the propeller trikes. Learn more about your child we asked one of the designers of the project “Comet” and the pilot S. Sitdikova.

 

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