Patent ID: 7770843

Claim:
A rotorcraft ( 21 ) having a antero-posterior midplane ( 33 ) and a transverse axis ( 34 ) arranged perpendicular to each other, comprising: a fuselage ( 22 ) and a skid undercarriage ( 20 ) having skids ( 24 , 25 ) interconnected by a first cross-member ( 26 ) and a second cross-member ( 27 ); first and second connection means for connecting the first cross-member to the fuselage; and third connection means ( 28 ) for transmitting forces from the second cross-member to the fuselage and vice versa, wherein said first connection means ( 30 , 31 ) comprise two first parts bearing against the first cross-member ( 26 ), said first connection means alone transmitting forces from the first cross-member ( 26 ) to the fuselage so long as the deformation of the first cross-member ( 26 ) remains less than a determined non-zero level of deformation in rolling or in vertical sinking, said two first parts being spaced apart along a length of the first cross-member on opposite sides of the antero-posterior midplane of the rotorcraft, and wherein said second connection means ( 29 , 32 ) comprise two second parts that are spaced from the first cross-member ( 26 ) until said determined non-zero level of deformation of the cross-member is reached or exceeded, said two second parts bearing against the first cross-member only when the deformation of the first cross-member ( 26 ) reaches or exceeds said determined non-zero level of deformation, said two second parts being spaced apart along the length of the first cross-member on opposite sides of the antero-posterior midplane farther from the antero-posterior midplane than respective ones of said two first parts.