At the moment there is a worn bicycle chain in the white paper from a bike with a derailleur. The purpose, the chain has to allow flex in the direction that a chain always folds together. But 90 degrees turned, it has to be as stiff as possible. So really not a chain for a derailleur. I heard from a friend that a half link chain might be what I'm looking for.
What do you guys think? The chain that I'm looking for has to be reasonably available. Not a million bucks. The chain links can't be to big.