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Cheranovsky Trapetsia
Aerodynamic investigations carried out at TsAGI at the end of the 1920s showed that the parabolic wing did not have great advantages in relation to flight characteristics and that the construction was quite complex.
In view of this Cheranovsky would decide to try a different wing composition on his new models. The triangular configuration with high elongation and vertical rudders at the ends was selected.
The first model to use this configuration would be the "Trapetsia" (Trapeze), (Russian: Черановский “Трапеция”) which was built in 1924 in the NKPS circle of interest.
The "Trapetsia" was conceived as an experimental glider to study the behavior of the new wing configuration. It was a flying wing with a trapezoidal shape in the plane.
Wing shape aside, its construction was generally similar to that of previous parabola-wing models.
This model participated in the III National Sailing Competitions, but in the presence of construction problems it was not allowed to fly.

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