Timemay any flight models are, in fact, consists of two clearly differentiated stages. The first — motor climb. The main objective here is any means for a strictly limited time for a given mass model and power plant to raise timesnow for possible high altitude and to accelerate to maximum speed, allowing for a transitional land use kinetic energy for an extra lift transition point in the planning mode. The most logical way to achieve these requirements is the reduction of aerodynamic drag of the model in take-off configuration.
The second phase of flight — planning. Task is only one: to keep the model in the air max time. Typically, this is achieved in two ways (and implemented at the same time): the increase in elongation of the wing and use wing-bearing profiles expressed concave-convex type. Immediately it should be noted that experience has shown the incompatibility of the requirements of the two main phases of flight Tierney models, and all of the modern championship “tamirci” — in fact, the result of a compromise between two contradictions.
However, the compromise is a delicate matter, difficult… and not always grateful. The author of this project in 1976 was able to find a solution to get rid of design contradictions when creating a championship tie-dimensional. Unfortunately, a number of reasons forced him to retire from sports modeling, and he has failed to realize a very interesting idea Viva. But due to the high quality study of the relevance of the new designs is completely preserved to the present day. So I hope that the publication will interest fans of sports class of timed models and is useful to someone good idea. Note that the development fully complies with modern rules and requirements of technology of the timer.