US 4,795,111 A · Robotic or remotely controlled flying platform

Abstract

A flying platform, propelled by at least one ducted fan causing a vertically downwardly directed airstream in and through a cylindrical duct. A vane system in the duct has two mutually perpendicular pairs of diametrically opposite first vanes, each extending in from the duct rim toward the center of the duct. Each pair of first vanes provides a pair of generally vertical walls parallel to a diametral line across the duct, and they define duct passages between the pairs of vanes and define quadrants between adjacent pairs. Each first vane has an upper, fixed, rigid portion and a variable camber flap depending therefrom. A first servomotor with linkages vary the camber of each pair of flaps, so that the camber of the flaps of each pair is at all times the same amount but in opposite directions. Preferably, there are also four second vanes, one bisecting each quadrant, and a symmetric pair of spoilers is mounted on each second vane. Each pair of spoilers is independently movable, as a pair continuously between a position substantially blocking airflow through the outer portion of said quadrant and a position permitting substantially full airflow therethrough. A second servomotor with linkages symmetrically varies the position of its spoilers. There may be a radio receiver responsive to remote control signals for actuating each servomotor and its linkages.

Claims19

Dependent claims

A flying platform, including in combination:

at least one ducted fan comprising power means, a horizontally mounted propeller having blades and connected to and driven by said power means for causing a vertically downwardly directed airstream, and a cylindrical duct having an outer rim extending around and beneath said propeller for confining said airstream, and
a vane system in said duct comprising four pairs of first vanes, the vanes of each pair being parallel to each other and to a diametral line across the duct end extending in from said rim toward the center of the duct, each said pair of first vanes providing a pair of generally vertical walls defining generally rectangularly shaped duct passages and the walls of adjacent pairs defining quadrant shaped duct passages, each said first vane having an upper, fixed, rigid portion and a variable camber flap depending therefrom, and first servomotor and linkage means for varying the camber of each of said flaps, so that the camber of the flaps associated with a particular pair of said first vanes is at all times the same amount said flaps being positioned along the vertical axis of said duct so that the center of gravity of said platform lies within the limits of the upper and lower extremities of said flaps whereby said flaps may be used to provide yaw and translational forces to said platform without imparting significant pitch and roll moments about said center of gravity.

A robotic or remotely controlled flying platform, including in combination:

at least one ducted fan comprising power means, a horizontally mounted propeller having blades and connected to and driven by said power means for causing a vertically downwardly directed airstream, and a cylindrical duct having an outer rim extending around and beneath said propeller for confining said airstream,
a vane system in said duct comprising two mutually perpendicular pairs of diametrically opposite first vanes, each extending in from said rim toward the center of the duct, each said pair of first vanes providing a pair of generally vertical walls parallel to a diametral line across said duct, said walls defining duct passages between the pairs of said first vanes and defining quadrants between adjacent pairs, each said first vane having an upper, fixed rigid portion and a variable camber flap depending therefrom, and first servomotor and linkage means for varying the camber of each pair of said flaps, so that the camber of the flaps of each pair of first vanes is at all times the same amount,
four second vanes, one bisecting each said quadrant,
a symmetric pair of spoiler means in each said quadrant mounted on one said second vane, each pair being independently movable continuously between a position substantially blocking airflow through the outer portion of said quadrant and a position permitting substantially full airflow therethrough,
second servomotor and linkage means for each said pair of spoiler means for symmetrically varying the position of its said spoiler means, and
receiving means responsive to remote control signals for actuating each said first and second servomotor and linkage means.

3 more elements

A flying platform, comprising in combination:

at least one ducted fan including power means, a horizontally mounted propeller having blades connected to and driven by said power means for causing a vertically downwardly directed airstream, and a cylindrical duct having an outer rim extending around and beneath said propeller for confining said airstream;
and
a vane system in said duct including a plurality of first vanes each extending inwardly from said rim toward the center of the duct, each said first vane providing a generally vertical wall which cooperates with adjacent walls to define vertically extending duct passages, at least some of said first vanes having an upper, fixed, rigid portion and a lower portion including a variable camber flap, and first servomotor and linkage means for varying the camber of each of said flaps, said flaps being positioned along the vertical axis of said duct so that the center of gravity of said platform lies within the limits of the upper and lower extremities of said flaps, whereby said flaps may be used to provide yaw and translational control forces to said platform without imparting significant pitch and roll moments about said center of gravity.

Dependencies are inferred from the claim text.

Robotic or remotely controlled flying platform

Life of this patent

Robotic or remotely controlled flying platform

Life of this patent

Abstract

Claims19