Fig. 4: Performance of the spiral hybrid actuators when lifting objects.
From: Logarithmic and Archimedean organic crystalline spirals
a Schematic diagram of a model of a crane based on the spiraling actuator of P4//2. b Snapshots showing the actuator lifting an object. c The actuator lifts objects at different humidity levels. d Variation of the height with humidity measured for different weights of the cargo. e Variation of the height with weight of the cargo measured at different humidity levels.
