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01 · SUBSECTIONPrehensile Pedal System

Opposable hallux

A big toe that grasps — 40 N pinch against the lateral toes.

Cutaway of the foot's toe bay with the yellow dermal flap rolled back, revealing the steel hallux drive shaft, parallel rows of cylindrical linear actuators and a bundle of orange high-tensile tendon cabling routed to each phalange. Leader arrows point to four labelled parts.

The big toe sits at roughly 35° to the others and can rotate against them with a peak pinch force of 40 N. This lets the companion grasp a handrail, stabilise itself on a kerb, or wrap a foot around a beam during canopy work on enterprise units.

SPSpecifications
Opposition angle
≈ 35°
Peak pinch force
40 N
Use cases
Handrail · kerb · beam grasp