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US 12,179,928 B2Granted
Aircraft with arm having eigenmodes in disjunct frequency ranges
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorMartin Hoffmeister
Life of this patent
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Abstract
An aircraft includes: a body with an arm. The arm carries a lifting rotor. The arm has a cavity. The aircraft may include at least one of: the arm being made of sheet metal, and the cavity includes an embossment or a corrugation in the sheet metal. The cavity may contain cables and the cables run from the body along the arm to the lifting rotor.
Claims12
An aircraft, comprising:
- a body with an arm,
- wherein the arm carries a lifting rotor,
- wherein an underside of the arm has an externally facing concave cavity extending along an axial length of the arm and along a center of the underside of the arm,
- wherein the cavity has a first axial end and a second axial end, the first axial end being proximal to the body and the second axial end being distal to the body,
- wherein the arm includes a point of attachment by which the arm is configured to be attached to the body,
- wherein the first axial end of the cavity is axially offset from the point of attachment along the axial length of the arm, and
- wherein a width of the cavity at the second axial end is greater than a width of the cavity at the first axial end.
4 more elements
An aircraft, comprising:
- a body;
- an arm;
- and
- a lifting rotor,
- wherein the arm is attached to the body and carries a lifting rotor,
- wherein an underside of the arm has an externally facing concave cavity extending along an axial length of the arm and along a center of the underside of the arm,
- wherein the cavity has a first axial end and a second axial end, the first axial end being proximal to the body relative to the second axial end from a point of attachment of the arm to the body and the second axial end being distal to the body relative to the first axial end from the point of attachment of the arm to the body,
- wherein the first axial end of the cavity is axially offset from the point of attachment along the axial length of the arm, and
- wherein a width of the cavity at the second axial end is greater than a width of the cavity at the first axial end.
6 more elements
Dependencies are inferred from the claim text.