Participants and guests of the all-Union review-competition of self-made ATVs in Arkhangelsk were surprised to find that in the city there is a whole Amateur “industry” for the manufacture of such machines on the low-pressure tires. And the scale of it so large that it can only be explained by a rare combination of factors such as the availability of the industrial base, proximity to nature with its roadless spaces and a large number of enthusiasts. Characteristically, acquire pneumatic-tired machines and townspeople, and villagers: for travel on fishing, hunting, mushrooms and berries. Consider also that for some it is the only vehicle suitable to local conditions.
Analysis of the number of participants in youth competitions of aeromodellers in the expense of building a traditional school clearly indicates a much higher availability of gliders compared to rezinomotornaya. This is understandable: because in the end, the last is the same as the gliders, but are equipped by Moto installations, bringing the sharp complexity of not only manufacturing, but, more importantly, adjust Svobodnaya.
Operation model glow motors has always presented difficulties for most modelers. Due to the high toxicity of alcohol — the main component of fuel for “calloc” — this type of engine was fully closed for the young. And adult athletes at any level of supply of methanol, the eternal stumbling block.
Historians say that the sail appeared on land about four thousand years ago! Fiction? No, the reality is — there is documentary evidence.
This is a hovercraft I built for several years. Engine – from VAZ-2108 with a capacity of 74 HP, Case – fiberglass, fiberglass epoxy resin, is made of the type “sandwich” with the Styrofoam plates. The structure weight was about 370 kg. propeller – propelling three-bladed, with a diameter of sweeping the surface 1700 mm and variable in place of step. There are still two the blower for pressurization of the airbag. Skirt the cushions are made from French awning waterproof material with a density of 600 g/m2.
We offer young athletes like high-speed cord combines the experience gained in this kind of automodelisme in recent years. Sorpresa design is logical from the point of view the sole purpose of achieving the highest speeds, that is, turning the aircar “Frank” sportsread. But if to argue from the point of view of an engineer, simplicity is the evidence of correctness of the choice of scheme design and, if it reaches the desired result.
Bike, perhaps the most common vehicle. And the fact that the most economical — there is no doubt that only two sandwiches to two hours to pedal. But is it possible to increase the efficiency of the human “engine”? With the reduction of spending “fuel”, nothing happens. Friction and the weight of the machine is reduced almost to a minimum. There is also a “box of speeds” the device for changing the gear ratio by switching the circuit to a small or large sprocket. It remains only to lengthen the levers of the pedals, but experts adamantly claim that their optimal length — 170 mm.
One of the main problems faced by the Amateur constructor engine aircraft — selection or production of the power plant the necessary power, weight and efficiency. This problem is solved normally, on existing capacities and experience of building such units.
The creation of various devices to facilitate work in the garden I have been doing for many years. However, to the readers of their developments have not yet ruled, this is my first attempt.
I want to introduce readers “To the” constructed me an amphibian. Constructed I, in practice, to solve a number encountered in the design of problems and contradictions. There were quite a lot, but the main makes sense to call.