And what exactly do you plan to do with that?

Frighten the girls away, ye will.

Here are some festo air-muscles in opposition to each other. Even a home-made muscle of that size can lift over 60k. These are rated to 6bar and are being pushed to new speeds (normally top speed is 100hz, or 50hz for home-made)

Festo ones are very expensive, but it's entirely possible to home-make air-muscles with decent performance quite cheaply and using kevlar braid instead of nylon which most use.



I highly recommend a search of "festo" on youtube, they've done some amazing vehicles and robots.