Did you know that a lot of aircraft Amateur-built are based on BRO-11M – glider initial training famous Lithuanian aircraft designer B. I. Oscines. Very easy to manufacture and reliable in operation, designed on the basis of classical schools of design of aircraft of the 1930-ies, the glider won the sympathy not only of beginners glider, but Amateur aviators, who saw in the design of the BRO-11 M, and its elements useful for the creation of Amateur gliders and airplanes. While some used the scheme of the airframe as a whole, others copied the design of the wing, a third of its original control system… Word, BRO-11M was a kind of tutorial of novice aviators.
BRO-11M – STEP INTO THE SKY
To the journal is receiving increasing numbers of letters from modelers who make their first steps in the class RC. And, as a rule, one request — publish a description of the glider or plane for the initial training. Increased attention to the units of this complex model aircraft class is clear — the domestic industry began to produce proportional radio control systems, and the achievements of modern radio electronics, in particular the emergence of new circuits, give the opportunity to build a good improvised equipment. Published drawings and a description of the “flying coach”, an interesting series of design solutions that allowed to create a universal multivariate training model. It is made entirely of domestic materials.
When designing the model of the catamaran, calculated under domestic motor KMD-2,5, revealed the need to adjust speed on the radio. Had to carve out two parts aluminum diffuser carb increased length and a rotating door. New diffuser installed instead of the original, so the dimensions of the parts included in the rear wall of the housing, to accurately duplicate the dimensions of the serial. The remaining proportions are random. Note that when performing the planting hole under the flap is necessary to provide a dense enough mutual fit of these two parts. A cross hole in the valve corresponds to the inner diameter of a diffuser in the open position of the ledges at the entrance should not be. The control lever is formed by filing a thin disk, machined integral with the valve.
Probably the majority of readers, modelers had to build a model microelectrophoresis. These are good motors, easy to maintain — put it on the car, hooked up the batteries, and you can experience the new design in action. But how well able to use the power of the motor depends on the manufacturing quality of the drive. First and foremost, from its driving member connecting the motor with the mechanism. The slightest imbalance mounted on a gear shaft, the runout of the friction roller or pulley, and the engine will not even crank gear. The origins of the errors most often lie in the landing accuracy of a leading element on the axis of the armature. As a rule, planting the diameters of the parts do not match, and you have to wind on the shaft threads with glue or pull on it cuts the vinyl chloride pipe. It is clear that to talk about alignment in these cases is not necessary.
What processing methods but use the young technology for the manufacture of shells of rocket modeling! The most affordable and waste — vikla CA on the blank paper cylinder, master, “the one receiving a novice can just a few classes. For more complex models, especially copies, it is necessary to use a metal mandrel, fiberglass and epoxy resin. To make such tooling without a lathe, you might need it and when processing fairings models.
The appearance on the competition models of sailing catamarans and trimarans was the natural result of the development of a very interesting class of ship models — radio-controlled yachts. First I gotorussia was built in our country in 1974 almost simultaneously by three athletes from Kiev, Valeriy Bondarenko, a Muscovite Valery Efimov and the author of this article. All mini yachts was created on the basis of requirements for models of class F5-S (with an area of 0.5 m2 sail). The best results showed catamarans. In the future, on the basis of their group Kazan modelers have worked a few designs, which already could compete with the traditional single-hulled yachts with moderate wind and have a distinct advantage with strong.
New simplified design of the tow hook works just as reliably as the best modern designs, providing easy control model glider when you search for updrafts and good acceleration apparatus for dynamic start.
In 1980, the sub-Commission on the rocket modeling of the FAI decided to introduce a new class of raketoplana S8E with a maximum mass up to 300 g engine with a total impulse of 40 n*S. Model of this class, created by Bulgarian athletes participated in the competitions and showed good results. Having the necessary materials, it is easy to make in the flying circle. The engine of rocket with a total impulse of 40 n*works for 10 s. To control the model can be used in compact
Still, the vast majority of models of submarines with rubber motor class EL-500 (500 mm in length) are built on the same scheme. However, the adopted version with the detachable bow and stern parts of the hull has a number of disadvantages. No matter how carefully manufactured parts, the line connectors on the polished surface of “skin” still stand out, which spoils the appearance polyopia. Students involved in a circle of the second year (namely, they calculated the design of class-EL), not under force independently to build the model without the constant help of the leader of the group.
Regular readers of our magazine are already familiar with the Kaluga Amateur designer V. N. Arkhipov, author of easy and productive tillers (see “M-K” № 6, 1982). However, Valentin Nikolaevich considers that it is not so simple as it may seem: to walk on the plowed land, driving a two-wheel tractor and trailer at the same time, is quite tedious and is not for everyone. That’s why Arkhipov undertook the construction of a mini-tractor with four wheels that “ride” him: to various agricultural work, while not on m itself. The attempt failed, and the light appeared a kind of chair on wheels — tractor “Kaluzhanin-14”. Not so long ago, the author had submitted it to the popular TV show “you can” and received the approval of the competent jury Today at the request of viewers and our readers the journal publishes drawings on which you can build the same “iron horse” helper of your household and garden plots.