Re = [-1.5  -1.0  -0.5   0.0   0.5   1.0  1.25  1.5  1.75  2.0   2.5   3.0   3.5   4.0   4.5   5.0     5.1     5.2     5.3     5.4     5.5     5.6     5.7     5.8     5.9      6.0    6.25   ];
Cd = [ 2.82  2.35  1.9   1.45  1.0   0.62 0.4  0.3   0.15  0.0  -0.22 -0.35 -0.375 -0.35 -0.3 -0.32   -0.32   -0.32   -0.31   -0.5    -1.0    -1.1    -1.0    -0.9   -0.85     -0.8   -0.9   ]; 
Re = 10.^Re;
Cd = 10.^Cd;
