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    Sunday

    Drawings of Sailplane

    The model is designed as a special category for competing in RCV2-PM. According to my requirements should be as simple as construction, and operation. The model is equipped with a control elevator and rudder and engine zhasínáním necessary. It is designed for engine MVVS Model 2.5. In conjunction with a tuned damper has sufficient power, which is necessary to achieve the required height during the time of ninety seconds of powered flight.


    Drawings of Sailplane



    Specs:
    Wingspan 2775 mm
    Length 1370 mm
    Weight 2000 g
    Engine 2.5 cm3
    Controlled elements S, V, M
    Michael Křížka Construction

    I decided to use traditional materials, eg balsa and plywood combined with pine slats, so that the model weighed as little as possible.
    The original type had a tail made of balsa full and had a shorter torso front wing, which resulted in problems with balance model. However, the model had the lowest allowable weight. The second model was therefore modified: Tail surfaces are design and front torso is longer. This model is on the drawing.

    The model is solved as a transportation reasons-tion decays with a detachable wing center, on which are fastened to two clutches each wing, anti-eject secured a pair of hooks associated with rubber. It is also beneficial for good access to the radio set. The model is not designed for sharp turns and steep descents, which at the proper allocation of air time is not necessary.
    Due to the time designated motor, which must not exceed, I had to solve switching off the engine, which is stacked with the elevator control, the full suppression of the trigger mechanism and stops the engine. The first version is intended for detonation engines, the other two are suitable for engines with glow plug.

    The wing model consists of two halves, each of which has two parts. Halves are connected to the midsection of the joints and duralumin sheet steel wire and the whole is fastened to the fuselage with two screws M5. The main beam consists of two spruce flanges. Leading the balsa strip, outlet consists of two balsa flange. Rise of a two-sided coating of solid balsa. Ribs are strapping. The ears are glued to the central parts of the butt.

    Floating elevator is divided, half are connected by steel wires. The design is celobalzová. After sticking it to the elevator around the NACA profile sanded 0006th SOP is built like elevator.

    The hull is made of balsa and plywood. Plywood sides are reinforced with balsa. The bulkheads are plywood fuselage. The top and bottom flange of the fuselage behind the wing are balsa. The lower front cover plywood, the bottom corners are reinforced with pine slats. Glued to the hull is grinded section with rounded edges, front passes into a circular cross section follows the spinner. Finally, the glass fiber hull přelaminován

    The wing and tail surfaces, we can pull the paper or iron foil. Paper coating can be sprayed with colored nitroemaily, and if we use the engine glow plug, even with protective varnish.

    To control the model set just two servos. She pulled the tail rudders are made of spruce strips. Mechanism for stopping the motor is connected to the elevator servo steel string, led by a plastic tube.


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