“School” model class F2D — further development of the schematic published in “M-K” № 7, 1986 in the article “Record holder… simplicity.” Indigenous improvements of the characteristics of the new device was able to achieve, preserve the unique simplicity of the power unit (which rivals and assigned to our bouzoukis the name “schematic”). This primarily refers to the stability of the start and the behavior of the model in the maneuver on the windward side of the flight hemisphere.
You’re already familiar with the option to satisfy almost all requirements and, moreover, greatly superior to the known design with the motor a working volume of 3.5 cm3. However, a small mass of bouzouki (made entirely of pine, it was lighter than balsa!) several complicated to run. Although in the hands of the athletes, more or less mastered the basics of aerobatics, the model has been out of competition, we decided to still do to improve it.
With the design agreed at once: the increase in mass is unacceptable — you will lose all the advantages in maneuverability. The solution was sverdiolas: just to deformirovanii shape of the wing. Warp “stabilizer” on the outer wing at the same time with the increase in the area last gave the model a sharp asymmetry in the resistance. In this way more than compensated resistance cords, and a betta never showed the desire to go in a circle. The tension was perfectly stable in all phases of the launch and flight.
In addition, the side installation of the rudder affected the distribution of lifting the vultures wingspan. Wherever you leave the wheel, it always works and at the same time as the flap, greatly reducing the load-bearing properties of the wing compartment. It is easy to understand that now the inner wing, despite the smaller area will always have a higher load-bearing properties. A further increase in the tension cords are secured.