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
Chassis for a motor vehicle having an electrical axle
Touch panel
Chemical methods for treating a metathesis feedstock
Apparatus for stimulating living body
System and method for interfacing sensors to a sterile flow stream
Level shifter circuit
Enabling user defined network change leveraging as-built data
  Randomly Featured Patents
Soap stick launcher and method for launching soap sticks
Machine method to perform newton iterations for reciprocals
Interactive apparatus using print media
Steam oven
Vegetable holder
Measuring tape
Portable media docking speaker system
Process for producing polymers of vinyl aromatic compounds using polymer-containing catalyst systems
Puncture proof surgical glove
Methods of using low molecular weight heparins for prevention or treatment of pathological processes