a_t (degree)

0

10

20

30

40

50

60

70

80

90

L (mm)

0

312

615

898

1155

1376

1555

1688

1770

1796

N_s (−)

300

200

175

150

125

125

125

125

125

125

N_s/N (−)

1.00

0.67

0.58

0.50

0.42

0.42

0.42

0.42

0.42

0.42