The problem of noise of operation of internal combustion engines exist in all types of modeling. The modelers of the upper boundary of the acceptable level of noise has long been accepted 80 dB (when exceeding this value the result immediately canceled) have increasingly measured the noise of the flying machines, especially RC, are cases of control “of holosystolic” of micromachines and the competition of avtomodelistov. Performance requirements for noise suppression tougher every year, probably close to the time when the point of maximum noise will be introduced in the competition rules for all classes.THE SILENCER IN THE MUFFLER
The problem of noise of operation of internal combustion engines exist in all types of modeling. The modelers of the upper boundary of the acceptable level of noise has long been accepted 80 dB (when exceeding this value the result immediately canceled) have increasingly measured the noise of the flying machines, especially RC, are cases of control “of holosystolic” of micromachines and the competition of avtomodelistov. Performance requirements for noise suppression tougher every year, probably close to the time when the point of maximum noise will be introduced in the competition rules for all classes.
First a few words about yourself and a situation in which I found myself by fate. It all started with the fact that at the time of the motorcycle accident I received a severe spinal injury with spinal cord injury. Unfortunately, I did not immediately, but two months after the injury. In the end, total paralysis of the body from the shoulder blades and down to the heels. The rest of my life I was destined to spend in bed or in a wheelchair. And I was, when I broke down, only 26…
In the construction of cottages, garages in the farm economy often have to sift through loose building materials, soil or garden soil. It uses a special device — the so-called roar. His classic version of the frame with the grille installed on the box is a very cumbersome and inefficient. I tried to make it mechanized, as well as more compact and quiet compared to industrial samples.
The garden in the garden requires constant attention and care. But if the issues of timely tillage, planting and fertilizer application depend primarily on the diligence of owners, the need to maintain optimal soil moisture is dictated mainly by natural factors. The arid climate of some regions of our country requires an additional daily irrigation of family land. This condition becomes crucial for obtaining good yields.
The basis of the hive — a column with tap holes on the front doors on the rear and a slider on the inside of the side walls. On the slider rest seven light plywood cassettes with cellular framework. For inspection and replacement of frames of the cassette may be made removable metal table. Top and bottom of the column access block tick the honeycomb lattice, from the weather hive covers shed roof with ventilation slots.
Compaction of the soil. It occurs, as is well known, not only as a result of systematic effects on the earth-wet nurse of heavy machinery, vehicles, but also because of natural causes. And ultimately leads to large losses in productivity, reduction of soil fertility.
Meditating and finding equipment for the new sports season, we decided to stop on tested, proven for many years solutions. Sacrilega scheme is not too large wingspan; horizontal tail with stabilizatory part and Elevator… However, the latest publication in the “M-K” made us much more attentive to the consideration of the moments of inertia, and therefore the maximum relief of the tail section, respectively, projected for a very short bow, load-bearing engine. With the usual for pilotaggio measurements was “obladis” — because in the design model, greatly influenced by the shape and length of the nose of the fuselage. However, this problem we managed to solve due to the unusually long chassis fairings. With them the model is not only advantageous to look at the ground, but in flight is not inferior in the perception of long-nosed cars. Benefit appearance and is the simplest closure of the plant verhneraspolozhennyh shields (in the bottom of the engine is completely open), and a large spinner.
Of most interest to the weather reports for tomorrow show… motorcyclists. Indeed, unexpected rain or, God forbid, snow transform trips on a two – or three-wheeled cars in torment. While it is not so much the driver (he knew what was going on, getting open to all the elements the car), how many passengers. Even in a side trailer can’t hide him from the weather troubles. That is why many motorcyclists are trying to solve this problem, creating on the basis of the serial side of the trailer closed cockpit with a particular level of comfort.
It so happened that almost all the children’s toys with a muscular drive — pedal cars, maps, bikes — designed for use in main leg muscles. And almost none of these machines work the muscles of the hands. It is in vain, since the movements resembling, for example, rowing, at the same time would be included the muscles of the arms, shoulders and back. Such actions also contributed to active pulmonary ventilation. All this prompted me to design and fabricate for my son “Roller”-muskurahat with manual transmission.
Since 1987, entered into force new “Rules for flying sports in the USSR”. Changed and technical requirements for model rockets. So, in the category B4 (model raketoplana) one of them says: “In the case of models with a flexible wing of the planning part should be more than 50% of the starting mass of the model”. As practice shows, the innovation did not deter the athletes from the construction of miniature gliders, forced to look for new ways of their technical improvement. In our opinion, taking into account the new requirements are a very promising model with Delta wing, designed by athletes from the Moscow city Ramenskoye A. Levin and I. Prikhodko.