B - Operations – Transporting – 64 – C
Patent
B - Operations, Transporting
64
C
B64C 27/10 (2006.01) B64C 27/12 (2006.01) B64C 27/20 (2006.01)
Patent
CA 2397626
The invention concerns an aircraft comprising a central nacelle around which are two synchronised coaxial counter-rotating rotors each having a crown, (2, 3) and at least two blades. The nacelle comprises two interconnected structural rings (10, 11) acting as guides for the rotors. Means are provided for modifying the pitch of the blades comprising two oscillating rings (31, 32). Each oscillating ring is associated with a crown (2, 3), by being concentric thereto, and is driven in rotation by the crown, and is integral with the blades of the corresponding crown by means of connecting rods or cables. Each oscillating ring (31, 32) is secured to means for vertical displacement and displacement about a transverse axis to provide a selected distance relative to the corresponding crown (2, 3) along a circumference. The guiding of the crowns on the structural rings (10, 11) is provided by rollers (30) with perpendicular axis to the plane containing a structural ring and the corresponding crown, the rollers and the blades being equally distributed between the structural ring and the corresponding crown.
Cet aéronef comporte une nacelle centrale autour de laquelle se trouvent deux rotors contrarotatifs coaxiaux synchronisés présentant chacun une couronne (2, 3) et au moins deux pales. La nacelle comporte deux anneaux structurels (10, 11) reliés entre eux et servant de guides pour les rotors. Des moyens permettant de modifier le pas pales comportent deux anneaux oscillants (31, 32). Chaque anneau oscillant est associé à une couronne (2, 3), lui est concentrique, est entraîné en rotation par la couronne, et est solidarisé aux pales de la couronne correspondante par des biellettes ou câbles. Chaque anneau oscillant (31, 32) est solidarisé à des moyens de déplacement vertical et de déplacement autour d'un axe transversal pour présenter une distance choisie vis à vis de la couronne (2, 3) correspondante le long d'une circonférence. Le guidage des couronnes sur les anneaux structurels (10, 11) est réalisé à l'aide de galets (30) d'axe perpendiculaire au plan contenant un anneau structurel et la couronne correspondante, les galets et les pales étant équirépartis entre l'anneau structurel et la couronne correspondante.
Gyropter
Smart & Biggar
LandOfFree
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