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+//Example 14_7
+clc;clear;
+// Given values
+D_p=34.0;// The overall diameter of the propeller in cm 
+D_h=5.5;// The hub assembly diameter in cm
+n=1700; // rpm
+alpha=14; // The angle of attack in degree
+V_wind=13.4;// m/s
+
+// Calculation
+r=D_h/(2*100);// Radius in m
+omega=(2*%pi*n)/60;
+phi=atand((V_wind/(omega*r)));
+theta_1=alpha+phi;// Pitch angle at arbitrary radius r in degree
+printf('The Pitch angle at arbitrary radius,theta=%0.1f degree\n',theta_1);
+r_1=D_p/(2*100);
+phi_1=atand((V_wind/(omega*r_1)));
+theta_2=alpha+phi_1;
+printf('The Pitch angle at tip,theta=%0.1f degree\n',theta_2);