The turbomachine rotor blade is characterised in that the first root angle is smaller than the second root angle and the second root angle is substantially equal to the third root angle.

A wind turbine blade having a circular root portion and provided with root bushings for mounting the blade to a wind turbine hub is described.

In some situations, the root portion is non- aerodynamic.

The airfoil has a trailing edge extending from the root region to a tip distal from the root region.

The system uses at least one bracket which can be affixed to the root end of a blade, preferably by the mounting of the blade root end to a wind turbine hub.

The turbine blades are secured at their root end to a hub assembly.

A method of making a root end joint for a wind turbine.

Root brackets (19) with the chain connection (20) are fixed to the blade root.

The root spacer is arranged with the slot between the rotor disk and the blade root.

The root region has a ring-shaped cross section and comprises a cylindrical insert 7 embedded in the fibre-reinforced polymer so as to substantially follow the circumference of the root region.

The segments are joined together side- by-side to build up the circular profile of the root end.

This blade is provided with a root section for connecting the blade to the shaft or hub of the turbine.

The aircraft (10) comprises a fuselage (11) and a rhombohedral wing structure (12) comprising front wings (13, 14) mounted on a front wing-root support (17) and rear wings (15, 16) mounted on a rear wing-root support (18).

An assembly includes a rotor disk, a rotor blade and a root spacer.

A wind wheel consists of two parts: a short root part and a long wing-shaped part.