|
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese|
MODELING
Aerosleigh with swing suspension. Tips for a modeler
Directory / Radio control equipment It has been more than a decade since car modellers decided to make their sport all-season and came up with cord models of snowmobiles. Now, perhaps, it is even difficult to name the author, the first such modesh: the need to introduce a simple, affordable design into the curriculum of circles, which would combine the speed of production and the ability to use an internal combustion engine, would open up creative spaces for a novice modeler and, moreover, would not be simply "training" (as, say, contour rubber motors), was clear to many. Since then, four classes of cord sledges with internal combustion engines with working volumes of 1,5 and 2,5 cm3 - high-speed and copies - have won a firm place in car modeling. The mass nature of all-Union competitions is growing, and speeds are “arriving”. And at the same time, as it turned out, the simple-looking cord model of the sledge is fraught with many opportunities for further improvement. We have not yet matured to the blowdown stage, but aerodynamic calculations during design, strength tests, and engine operation have long been part of the practice of any circle. But the most important thing is that there is still a lot of creative work with the sledge model. Ways to install skates, stiffness of the suspension, installation of a tank - in no case are there yet unambiguous solutions. The description of the "rocking" model, published in this issue, is another evidence that the sleigh still has many reserves, the identification of which can lead to a further increase in the speeds of models of these classes. A distinctive feature of the snowmobile model (Fig. 1) - let's call them "Bear" - is the swinging rear and front suspensions. Thanks to this design innovation, the axis of the engine always remains parallel to the surface of the cordodrome. The model seems to roll over from foot to foot (like a bear cub). Neither bumps nor cracks interfere, and the nose looks only forward along the course.
And how does the model behave at the most decisive starting moment? Usually, under the action of the inertial moment from the propeller, the snowmobile tries to fall into a circle without having time to pick up speed. Experienced athletes eliminate this negative effect by twisting the model in the first circles. (An assistant in the center of the circle creates additional tension on the cord.) The "bear cub" at the moment of launch seems to squat on one leg (Fig. 3). The center of gravity is shifted to the side outside the center of the circle, and the moment of inertia from the screw is smoothed out. More than once we tested such a "starting landing" model in competitions, and it always justified itself.
Snowmobiles are easy to make - even beginners in car modeling are quite capable of building them. The model can be made in 1,5 cm3 and 2,5 cm3 classes. The design consists of a frame (fuselage), middle and rear oscillating suspensions and a pylon-motor mount. The fuselage is made of an aluminum tube Ø 14 mm, in which grooves for the pylon and hangers are cut. Beech fairing plugs are hammered into the tube in front and behind. The rear and front suspensions are cut out of a D16T sheet 2 mm thick, the skates are made of an aluminum corner. The swing of the systems relative to the fuselage occurs due to the brass rollers introduced into the cavity of the tube. The motor mount (sheet D16T 5 mm thick) is designed in one piece with the pylon and is attached to the fuselage with three M2,5 screws. The engine and fuel tank mounted on it are closed with a foam plastic fairing, pasted over with fiberglass and impregnated with epoxy resin. The fuel tank - a widespread type of "drinking bowl" allows you to maintain a constant engine mode throughout the distance. And the use of a single-bladed propeller simplifies its selection and manufacture, compensates for inaccuracies in engine adjustment and increases the average speed at a distance compared to a conventional propeller by 7,5% (Fig. 2). For beginners, this model is also good because you can participate in competitions with it not only in winter, but also in summer. It is enough to install trunnions with wheels instead of skates on suspensions (Fig. 4).
Are you going to go to the first start, rookie? We give you an idea and drawings! Build a snowmobile and make yourself a gift for the first exit to the cordodrome. Author: N.Komarov
▪ Cord aerobatic training model aircraft
The world's tallest astronomical observatory opened
04.05.2024 Controlling objects using air currents
04.05.2024 Purebred dogs get sick no more often than purebred dogs
03.05.2024
▪ Soldier boots as a source of electricity ▪ Digital music player SONY NW-E107
▪ Telephony site section. Article selection ▪ Fleming Alexander article. Biography of a scientist ▪ article Why does a giraffe have a long neck? Detailed answer ▪ trailer grader driver. Standard instruction on labor protection ▪ thermometer article. Encyclopedia of radio electronics and electrical engineering ▪ article Antenna amplifier. Encyclopedia of radio electronics and electrical engineering
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua |
We recommend interesting articles Section 
See other articles Section 
Latest news of science and technology, new electronics:
All languages of this page