Are there any alternatives to an electric actuator?

[EricH]

Originally Posted by BBray_T1296

It depends on the scale. I think it will be difficult to find an out-of-the box servo solution for a man sized sword swinging arm.

This is true. However, given OP's other threads, a hobby-grade servo just might do it. The scale here is roughly FTC-scale, so it'd depend on the arm and the linkage used. I would say the human-ish motion is what's being looked for.

Admittedly, it might need to be a rather large servo of that general type, but some of the sailing ones might be powerful enough.