Importance

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Abstract

The invention relates to a horizontal tail of a catapult launched glider which can change angles during flight. An horizontal tail which can change angles means that the horizontal tail is movable, a movable horizontal tail is achieved by sandwich a slow rebound means between the horizontal tail and the fuselage, the slow rebound means could be a memory foam or a compressible plastic telescopic tube, their properties is delayed restitution when the pressure acting thereon disappears, so the horizontal tail on top of the slow rebound foam is boosted and maintained at a negative angle with the longitudinal axis of the fuselage when there is no pressure acting on it, the compressible slow rebound means allows the horizontal tail be pressed downward from negative angle to zero angle or even to positive angle when squeeze the tail portion of the glider by fingers before launch, the horizontal tail is maintained at zero angle or positive angle at that time, after launch, the horizontal tail moves towards negative angle with a slow speed which is controlled by the expansion rate of the slow rebound means, the glider travels in the sky with a nearly straight upward climb first, then go down with a smooth gliding and landing as the horizontal tail has been propped up by the slow rebound means. Another play mode is by griping the sides of the fuselage without touching the horizontal tail, the glider will fly in circles.

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First Claim