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I think you need to change the position inside the visual tag. Try changing the xyz = "0 0 10" to xyz="0 0 0". The visual pose is with reference to the origin of the link.

<link name="blade">
<visual>
  <origin rpy="0 0 0" xyz="0 0 0"/>
  <geometry>
    <mesh filename="package://urdf_tutorial/meshes/blade.dae"/>
  </geometry>
  <material name="blue">
    <color rgba="0 0 0.8 1"/>
  </material>
</visual>