Brakes

#1
Basically, a swivel joint which can turn smoothly, lock solid, or anything inbetween.

I've found good substitutes for most other basic mechanical parts but the "simplest" replacement I've found for this part is variable-angle wings for variable drag.
 
#2
Basically, a swivel joint which can turn smoothly, lock solid, or anything inbetween.

I've found good substitutes for most other basic mechanical parts but the "simplest" replacement I've found for this part is variable-angle wings for variable drag.
A swivle joint that can lock in place? That's actually a really good idea. I could imagine some fun uses for that.

I think also allowing for it to be turned manually, like a steering block, could be a good idea. That way you could get it to start turning yourself if you ever had a need for that.
 
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