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Table 1 Lever arm and springs

From: The AMP-Foot 3, new generation propulsive prosthetic feet with explosive motion characteristics: design and validation

\(L_1\) = 70 mm

\(L_2\) = 40 mm

\(L_3\) = 103 mm

\(L_4\) = 60 mm

\(k_{PF}\) = 300 N/mm

\(k_{PO}\) = 180 N/mm