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Priority to ES1978233685UpriorityCriticalpatent/ES233685Y/en
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Pito with recreational device, which is characterized because on the cane of the whistle, with its corresponding orifices of insufflated vibration, the hollow body of a bird, equipped with wings, mounted on an axis that crosses the hollow body and whose wings constitute flat but out of phase almost 90º between them, being under these wings, and practiced in the same generatrix of the whistle layer, two holes where, when the air that blows out, hits the wings that it spins, waving likewise the tail of the bird that rests on the axis of the wings by its unseen end tail that goes outside increasing with its movement the visual and recreational effect (Machine-translation by Google Translate, not legally binding)
ES1978233685U1978-02-011978-02-01
WHEEL WITH RECREATIONAL DEVICE.
ExpiredES233685Y
(en)
Experimental damping-in-pitch of two slender cones at Mach 2 and incidences up to 30 deg(Oscillation experiments of slender cones at Mach 2 and 30 degree incidence to develop damping techniques)
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)
Some low-speed wind-tunnel techniques for the measurement of oscillatory aerodynamic derivatives on jet-blowing models(Damping in yaw on jet-flap blowing model measured by decaying oscillation technique)
Dynamic stability testing with ablation at mach 14 in a long duration wind tunnel(Hypersonic blowdown wind tunnel testing of the dynamic stability of ablating nose cones)
Approximate method for the determination of the natural frequencies of oscillation of cylindrical, conical, and toroidal shells(Approximate determination of flexural vibrations of shells of revolution with vibrations involving appearance of nodal lines along generatrix and meridional directions)