Axial flow ducted fan with a movable section
AssigneeSupra Lumina Technologies Inc.
InventorAyorinde Olusola Ajumobi
Life of this patent
Estimating the term…
Abstract
A ducted fan propulsion comprises a duct with a cutout and a movable duct section that is moved between a retracted position within the cutout and am extended position relative to the duct. An actuator is disposed within the duct wall and is connected to the movable duct section with actuating linkage. A control linkage connects the movable duct section to the cutout edges. The movable duct section is extended when the ducted fan propulsion transitions from vertical takeoff to a level flight or transitions from level flight to a vertical landing. The movable duct section is retracted into cutout an becomes integrated with the duct during level flight.
Claims20
A duct, comprising:
- a housing, the housing including at least:
- a hollow interior;
- an outer surface,
- an inner surface, the inner surface being spaced at a distance from the outer surface to define a duct thickness,
- a leading edge at an inlet end of the duct, and
- a discharge edge at an outlet end of the duct,
- the housing defining a flow axis between inlet and outlet ends;
- a cutout in the housing at the leading edge of the duct, the cutout sized to traverse inner and outer wall surfaces and interrupt the leading edge of the duct, the cutout defining two side edges with each side edge being disposed in a plane being generally aligned with a direction of the flow axis and a leading edge of the cutout disposed in a plane being generally normal to the flow axis, the leading edge of the cutout having a curved surface;
- and
- a reduced duct thickness portion between the two side edges, the reduced duct thickness portion including at least the inner surface, an outer surface of the reduced duct thickness portion, the outer surface of the reduced duct thickness portion being offset inwardly from the outer surface of the housing.
A duct, comprising:
- a housing including at least a hollow interior, an inner surface, and an outer surface;
- a cutout in the housing at a leading edge of the duct, the cutout sized to traverse inner and outer surfaces of the housing and interrupt the leading edge of the duct, the cutout defining two side edges, each side edge being parallel to a flow axis and a leading edge of the cutout disposed in a plane being generally normal to the flow axis;
- and
- a reduced duct thickness portion between the two side edges, the reduced duct thickness portion including at least the inner surface, an outer surface of the reduced duct thickness portion, and a second leading edge with a curved surface, the outer surface of the reduced duct thickness portion being offset inwardly from the outer surface of the housing.
A duct, comprising:
- a housing including at least:
- a hollow interior;
- an outer surface,
- an inner surface, the inner surface being spaced at a distance from the outer surface to define a duct thickness;
- a first leading edge at an inlet end of the duct, and
- a discharge end of the duct,
- the housing defining a flow axis between inlet and discharge ends;
- and
- a portion with a thickness being smaller than the duct thickness, the portion including at least the inner surface of the housing, an outer surface of the portion, and a second leading edge, the outer surface of the portion being offset inwardly from the outer surface of the housing, the second leading edge being disposed at a distance from the first leading edge along the flow axis and toward the discharge end, the portion extending from the second leading edge toward the discharge end.
Dependencies are inferred from the claim text.