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US 10,850,859 B2Granted
Aircraft with a propulsion unit with offset fan
AssigneeSafran Aircraft Engines
InventorsKevin Morgane Lemarchand, Tewfik Boudebiza, Gilles Alain Charier, Nathalie Nowakowski
Life of this patent
Estimating the term…
Abstract
An aircraft includes a wing having a first upstream spar and a second downstream spar extending in the direction of the span of said wing, and at least one propulsion unit supported by the wing. The propulsion unit includes a turboprop engine and a propeller. The propeller includes an external annular casing fixed to a suction surface of the wing, and at least to the first upstream spar via at least one first and second fastener.
Claims13
An aircraft comprising:
- a wing comprising a first upstream spar and a second downstream spar extending in a direction of the span of said wing, and
- at least one propulsion unit supported by the wing, the propulsion unit comprising a turbine engine and a propeller,
- wherein the turbine engine extends along a first axis and comprises a fan and a gas generator arranged downstream of the fan,
- wherein the propeller extends along a second axis and comprises a plurality of fan blades surrounded by an external annular casing, wherein the external annular casing is fixed to the first upstream spar via at least a first fastener, and the second axis is distinct from the first axis,
- wherein the external annular casing comprises an air-inlet lip arranged upstream of a plane transverse to the leading edge of the wing.
2 more elements
An aircraft comprising:
- a wing comprising a first upstream spar and a second downstream spar extending in a direction of the span of said wing, and
- at least one propulsion unit supported by the wing, the propulsion unit comprising a turbine engine and a propeller, the turbine engine and propeller extending along a first and second axis, respectively,
- wherein the propeller comprises a plurality of fan blades surrounded by an external annular casing, wherein the external annular casing is fixed to the first upstream spar via at least one of a first fastener and a second fastener,
- wherein either the turbine engine or the propeller is fixed under the wing and the other one is fixed on top of the wing, the first axis of the turbine engine and the second axis of the propeller being situated in the same vertical plane,
- wherein the external annular casing comprises an air-inlet lip arranged upstream of a plane transverse to the leading edge of the wing.
2 more elements
An aircraft comprising:
- a wing comprising a first upstream spar and a second downstream spar extending in a direction of the span of said wing, and
- at least one propulsion unit supported by the wing, the propulsion unit comprising a turbine engine and a propeller,
- wherein the propeller comprises a plurality of fan blades surrounded by an external annular casing, wherein the external annular casing is fixed to the first upstream spar via at least one of a first fastener and a second fastener,
- wherein the turbine engine comprises at least one free-turbine stage driving said propeller,
- wherein the external annular casing comprises an air-inlet lip arranged upstream of a plane transverse to the leading edge of the wing.
2 more elements
Dependencies are inferred from the claim text.