.I hasnt been the backing up that broke mine, it was the chains and the tilting down and catching a rock! I have C channel around the back, top and bottom but the front would have lasted longer with a cage.
That's a clever brake design.Started making a set of pneumatic operated wheel brakes for a friends RC jet. I have to mill a slot in the hub that captures the bottom of the gear, install an air fitting and match drill the mounting holes in the drum to bolt up to the wheel. The air fitting goes on the hub side of the center part and air pressure expands the O ring out against the drum.
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