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BLADE PROVIDED WITH A DRAG DAMPER, AND A ROTOR PROVIDED WITH SUCH A BLADE

  • US 20100247312A1
  • Filed: 03/24/2010
  • Published: 09/30/2010
  • Est. Priority Date: 03/27/2009
  • Status: Active Grant
First Claim
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1. A rotorcraft blade (1) provided with at least one spar (3) and an outer covering (4), said blade (1) having a hollow sleeve (10) with a wall (11) that is at least provided with said outer covering (4) secured to said spar (3), wherein the blade includes a rotary damper (20) provided with an inner tubular strength member (21) and an outer tubular strength member (22) that are coaxial and that are connected together by a ring (23) of viscoelastic material, said inner tubular strength member (21) being secured to said covering (4) and said outer tubular strength member (22) being provided with a fork (25) possessing first and second facing tines (26, 27), said first and second tines (26, 27) including respective first and second bores (28

  • , 28

    ) centered on a connection axis (AR1) so as to be suitable for receiving a first ball joint (41) close to the pitch-variation axis (AX1) of said blade (1), a first distance (DIS1) separating the connection axis (AR1) from the pitch-variation axis (AX1) of the blade being less than or equal to 10% of the chord (CO) of the blade containing said connection axis (AR1).

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