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Priority to ES1974200544UpriorityCriticalpatent/ES200544Y/en
Publication of ES200544UpublicationCriticalpatent/ES200544U/en
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Publication of ES200544YpublicationCriticalpatent/ES200544Y/en
Helicopter flying toy, formed by an elongated streamlined body with the characteristic shape of the helicopter is characterized because it is completely hollow and devoid of mechanism, thin-walled and absolutely lightweight, which has access from the bottom and keel a set of landing skis by internal sliding comprising a loco rotor shaft topped by a rotating head and large diameter blades whose axis has a lower end conditioned where the head of a rotating manual impeller is mounted for the aerial projections of the apparatus. (Machine-translation by Google Translate, not legally binding)
ES1974200544U1974-02-161974-02-16
FLYING TOY HELICOPTER.
ExpiredES200544Y
(en)
Studies of the effects of an inclined engine jet on the aerodynamic properties of tail control surfaces(Inclined engine cold circular jet effects on tail control surfaces aerodynamic characteristics, considering aircraft longitudinal stability)