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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