R 2[m] "Radius"
L 1[m] "Length"
W 1[m] "Width"
th1 1[mm] "Skin thickness"
th2 1.3[mm] "Stringer/Frame thickness"
h_s 30[mm] "Stringer height"
l_s 20[mm] "Stringer length"
h_f 60[mm] "Frame height"
l_f 20[mm] "Frame length"
d_r 5[mm] "Rivet diameter"
pitch 50[mm] "Rivet pitch"
fillet 3[mm] "Fillet radius"
l_clip 15[mm] "Clip length"
l_c 56[mm] "Framecut length"
h_c 29.5[mm] "Framecut height"
alpha 6[deg] "Section angle"