ROTOR BLADE FOR WIND TURBINE
FIG3 is a schematic view of a cross-section of a sub-blade of the blade in FIG2  FIG4 is a perspective view of a connector of the blade in FIG2
Referring now to FIG3, showing a cross-section of a sub-blade 108, the sub-blade 108 of the blade 104 will be further described. The sub-blade 108 may have an airfoil-shaped cross-section in order to generate a lift force when subject to a blowing wind. The airfoil shape comprises a leading edge 116, which is a point at a front of the airfoil that has maximum curvature, and a trailing edge 118, which is a point at a rear of the airfoil that has maximum curvature. A chord line 120 is defined by a straight line connecting the leading edge 116 and the trailing edge 118. The angle of attack of the sub-blade 108 is defined by an angle of the chord line 120 in relation to the wind direction.  Referring now to FIG4, a connector 110 of the blade 104 will be further described. The connector 110 may be a relatively thin structure, which is arranged to extend in a cross-section of the blade 104. The thin structure of the connector 110 may thus ensure that the connector 110 has a small surface facing the wind direction in order to limit a drag force on the blade 104 caused by the connector 110. The connector 110 may further have a stream-lined shape with the surface facing the wind direction being rounded so that the drag force on the blade 104 is further limited. According to an embodiment, an outer portion 134 of the plate-like structure 126 may be attached to an inner portion 136 of the plate-like structure 126 during assembly of the blade 104. A separation of the outer portion 134 and the inner portion 136 is indicated by the dashed line 138 in FIG4. Walls of the outer portion 134 and the inner portion 136 may each partly define the through-going hole 132. This implies that, during assembly of the blade 104, the inner portion 136 of the plate-like structure 126 may first be arranged in relation to the sub-blade 108. Then, when the sub-blade 108 is properly positioned in relation to the plate-like structure 126, the outer portion 134 may be attached to the inner portion 136 so that the outer portion 134 and the inner portion 136 together encompass a cross-section of the sub-blade 108. According to this arrangement, the sub-blade 108 does not need to be guided through the through-going hole 132 for mounting of the sub-blade 108 in relation to the connector 110.
perspective view, schematic view
122
shell
128
joining parts
136
inner portion
116
leading edge
130
large hole
3
blade are
126
plate-like structure plate-like structures
118
trailing edge
138
dashed line
134
outer portion
132
through-going hole through-going holes
110
connector connectors
124
supporting structure
120
chord line
['1. A blade for a rotor of a wind turbine, said blade (104) comprising a plurality of interconnected blade sections, each blade section comprising: a truss-like three-dimensional structure comprising a plurality of longitudinal strut members (108) extending substantially along the longitudinal direction of the blade (104), at least two connectors (110) extending in a cross-sectional direction of the blade (104), and diagonal strut members (112) extending diagonally through the blade (104) between two of the at least two connectors (112), thereby forming the truss-like three-dimensional structure, wherein the plurality of longitudinal strut members (108) are separated along an entire longitudinal direction of the blade (104), wherein the at least two connectors (110) are connected to the plurality of longitudinal strut members (108), and wherein the plurality of blade sections are interconnected by means of a connector of a first section being attached to a connector of a second section.']