Below are examples showing how to calculate the four parts of the wing. There are calculations for both the 2 and 10 meter turbines. This is the calculation for the 2 meter turbine (3,14 m2)
1. First part; the Momentum points are 1/4 out on the cord measured from the profile end.
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 

The blade width 75% out on the wing is = 0,15 m
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 

2. Second part; The blade width 50% out on the wing is = 0,18 m
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 

3. Third part; The bladewidth 25% out on the wing is = 0,29 m
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 

4. Fourth part; The blade width 25% out on the wing is = 0,54 m
Below: Ca = Lift force coefficient chart
These are the calculations for the 10 meter turbine (78,5 m2):
1. First part; the Momentum points are 1/4 out on the cord measured from the profile end.
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 5.6 = Constant 

The blade width 75% out on the wing is = 0,35 m
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 5.6 = Constant 

2. Second part; The blade width 50% out on the wing is = 0,44 m
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 5.6 = Constant 

3. Third part; The bladewidth 25% out on the wing is = 0,73 m
b = Blade width R = Turbine radius r = Radius of respective blade element z = Number of blades Ca = lift force coefficient by r lambda = Rotor speed (89 ) 5.6 = Constant 

4. Fourth part; The blade width 0% out on the wing is = 1,35 m
Offered by Geson.