Hola, David Sánchez Falero, ¿cómo estás?

Vimos su publicación sobre prótesis de pierna (https://github.com/davidsanfal/drakkar) y nos gustaría saber qué tamaño de actuador lineal se utiliza. 50 mm o 100 mm?
¡Aprecia tu atención!

This is definitely a great project!!!

¡¡¡Mucho ánimo campeón!!!

I don't know about feasibility or not, but I think it's great !  If you need a beta tester, I know a motivated athlete. I'll try to invite him on hackaday...

wow，interesting project, I had an idea like yours but, i just did some parts。And my project just beginning.

interesting project, though I do have some questions on feasibility.

ROM: most prosthetic knees allow about 120 degrees, so the amputee can easily kneel without having to balance all the time on their knees. It also eased pressure from the bottom of the stumps. Also, there are situations when sitting requires more than 90 degrees of bend at the knee.

Weight bearing: the two rods in the lower part of the leg look INCREDIBLY flimsy. You could probably have better weight bearing using Aluminum/PVC pipes. Also, why no love for the ubiquitous pyramid connector that ALL prosthetics use? Prosthetic legs are notoriously difficult to set up, and require alignment both above the knee (at the point of connection with the socket), and at the foot (to adjust for shoe soles and angle of the legs). Two rods will not allow for the six degrees of freedom needed to adjust the prosthetic at the feet & at the point where knee and socket join up.

Goat Foot: be VERY careful with the design of the foot. The goat foot design seems to have a weird way of capturing energy when walking. It seems to capture energy when the step is being made, but there seems to be minimal return of that energy when weight/pressure lowered from the foot. Remember, above the knee amputees can use up to 300% more energy walking (bilateral AK) than a normal person. The LAST thing you want to do is capture their energy when they walk, without an equal or almost equal return. There's also a clear engineering and anatomical reason why both prosthetic and real feet have an arch to them, by removing that, you remove the possibility of absorbing impact force by the prosthetic (and such, the force of a drop will go directly into the amputee's stump).