sin αst

NOMENCLATURE
Lgs Distance between upper guy wire and rotor axis [mm]
Lrb Distance between rotor centre and first bearing [mm]
Lrt Distance between the rotor centre and the yaw axis [mm]
LTB Distance between tower and blade [mm]
M Moment [Nm]
mB Blade mass [kg]
mr Rotor mass incl. generator [kg]
MS Shaft bending moment at the first bearing [Nm]
Mst Starting torque in thrust bearing [Nmm]
MT Tower moment [Nm]
mv Mass of tail [kg]
MxB Blade root bending moment [Nm]
MxS Torsion moment on the rotor shaft at the first bearing [Nm]
MyB Blade root bending moment [Nm]
n Rotational speed [rpm]
nb Number of bolts [-]
p Bearing contact pressure [MPa]
Pave Average Power [W]
pd Dynamic pressure [bar]
Pg Electrical power from generator [W]
Pr Rotor power [W]
Q Rotor torque [Nm]
r Radial coordinate [m]
R Radius of the rotor [m]
RB Bearing reaction force [N]
Rcog Distance between COG of a blade and the rotor centre [m]
Rdw Reaction force from dead-weight [N]
Re Reynolds number [-]
Rtf Reaction force from thrust [N]
Td Design life [yr]
V Wind speed [m/s]
Vave Annual average wind speed at hub height [m/s]
Vdesign Design wind speed defined as 1.4Vave [m/s]
Ve50 Extreme wind speed with a recurrence time interval of 50 years [m/s]
Vhub Wind speed at hub height averaged over 10 min [m/s]
Vref Reference wind speed [m/s]
Vtip Speed of the blade tip [m/s]
W Relative wind speed [m/s]
Wr Work performed by furling rotor [J]
WS Section modulus of shaft [mm 3 ]
WT Section modulus of tower [mm 3 ]
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