Amateur designers sometimes even adulthood may surprise the naive, and young, on the contrary, thoughtful and original solutions. And as an interesting personality, whose signature is a brief article describing the construction.
Stanislav GORYACHEV thought of his mini-tractor when he was 17 years old. Then started assembling. Collected, as he writes, “two summers”. Had to work from morning to evening. Thanks to the moral and material support of the parents (the father, for example, helped to sharpen and welding many of the details) the case was able to finish. The tractor, which Stanislav called “Asorensen”, helped the family work on the plot.
In the magazine we told about the methods of choosing the parameters of the resonant pipes (“modelist-Konstruktor” No. 9 for 1995) for highly accelerated engines. Fulfilling the wishes of modelers, editors have been asked to continue this theme of the master of sports V. Fontecha from Cherkassy (Ukraine). As you know, at the time of opening of the exhaust window motor is formed as the shock wave represents the process of propagation of a pressure pulse with velocity V=20 sqr(T) (T — exhaust gas temperature in OK). 
