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diff --git a/2223/CH11/EX11.3/Ex11_3.sav b/2223/CH11/EX11.3/Ex11_3.sav
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diff --git a/2223/CH11/EX11.3/Ex11_3.sce b/2223/CH11/EX11.3/Ex11_3.sce
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+// scilab Code Exa 11.3 Calculation on an axial compressor stage
+
+// part(c) Verification of stage efficiency of exa 11.1
+beta1=54.82;
+alpha_1=25;
+beta2=alpha_1; 
+alpha_2=beta1;
+phi=0.53; // Flow coefficient
+YR=0.09; // loss coefficient for the blade rows
+n_st=1-((phi*YR*(secd(beta1)^2))/(tand(beta1)-tand(beta2)))
+disp("%",n_st*1e2,"stage efficiency n_st=")
+// part(d) Determining efficiencies of the rotor and Diffuser blade rows
+n_D=1-(YR/(1-((secd(alpha_1)^2)/(secd(alpha_2)^2))))
+disp ("%",n_D*100," Efficiency of the diffuser n_D=n_R=")