In the journal “modelist-Konstruktor” No. 11 for 1981, we reported on a new category of raketoplana S8. In the same issue was published the drawings of models of the class S8A. Today we offer to your th account the description of another rocketplane — class S8D. It is interesting the original design of bearing areas of changing geometry. Furthermore, it simultaneously satisfies the requirements of category S4. Similar models in the class S4D Moscow athletes competed at the Championships of the USSR. The proposed design of the rocket plane designed by head of the circle of the Moscow city Palace of pioneers and schoolchildren by V. Minakova.
Minimum aerodynamic resistance, the stability of the vertical take-off and good planning are the main advantages of the rocket with the changing geometry of the supporting planes. On this model before take-off the console, bent down under the center section and then the dog wing rotates around a vertical axis that is located along the fuselage. Nylon thread passed through a hole in the engine compartment and attached to the hook on the center, lock the wing in this position. When triggered, expelling charge engine burn through the thread and folded the plane under the action of the rubber expand and open, turning into normal wings. In this kind of planning keeps them glued to the pylon stopper.
The plane of The two plates of balsa and light ply (1.5 and 3 mm), glued at a slight angle with ribs of different thickness. Boles thick are installed in the fixing brackets and the pylon. Wing is better to do a full swing, and after coating Amalita to cut the console to fit them joints with the center section. Then attach the console with four filament loops, insert the plane all the hooks and install the pylon. At the location of the holes the iodine axis of rotation to the top of the wing to glue the celluloid washer on the bottom end of the pylon strip of fiberglass with a thickness of 1 mm. Will remain only to fix the stopper pole made of OVS wire O 0,8—1 mm.