Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Rotary aircraft passively stable in hover










Image Number 3 for United States Patent #5297759.

A rotary aircraft includes a cylindrically tubular hub mounting a plurality of outwardly extending, resiliently flexible blades. The blades are uniformly spaced around the hub and its central axis and fixed in pitch. Outer tips on each of the blades are downwardly turned and outwardly turned sufficiently to balance the lift generated by the blades from air striking the aircraft horizontally when the aircraft is in hover to provide passive stability to the aircraft. A pair of propellered electric motors are mounted on a diametrically opposing pair of the blades, pitched transversely to the central axis of the hub and to a plane perpendicular to the central axis, to simultaneously provide both lift and rotation. A battery supplies all power used by the aircraft while radio control circuitry in the hub permits variation of the power supplied to the motors for altitude control of the aircraft.








 
 
  Recently Added Patents
User interfaces
Pull through coronary sinus pacing lead
Passive charge cord release system for an electric vehicle
Signal processing device, signal processing method and program
Portion of a display panel with an ambiguous facial expression icon
High damage threshold frequency conversion system
Inducement of organogenetic tolerance for pancreatic xenotransplant
  Randomly Featured Patents
Conveyor system with selectively disengageable carts
High temperature plasma gun assembly
Suspension display rack
Insulinotropic hormones and uses thereof
Method and apparatus for positioning an insert gradient coil within an examination region of a magnetic resonance imaging apparatus
Method and apparatus for generating information signal to be recorded
Intervertebral implant having extendable bone fixation members
Method and image processing system for reconstruction of an image
Method and apparatus for storing data with reduced redundancy using data clusters
Apparatus and method for localizing and removing tissue