This "always wanted" stock trailer I bought a couple of days ago had the wheel bearing dust caps missing. So I went to TSC and bought some and prior to installing, took the wheel off and thouroughly cleaned and lubed the hub.While off I finally saw what an electric brake is. There"s an electrical solenoid (rolled up wire)with a flat face that rides against a flat face on the back side of the brake drum. it is attached to an arm (just like on an emergency brake lever)which pushes the shoe against the drum when it moves away. As current (to the solenoid) from the controller is increased (by braking), the (what is now a) electromagnet tries to glue it"self to the metallic brake drum surface, but can"t. Since the drum is turning (as the vehicle runs down the road) the magnet initially gets a slight hold on the brake drum surface. The harder you push on the brake pedal, the more current and the bigger the magnet and the more friction/ attachment capability. As all this is causing the magnet to be pulled away from it"s stop farther and farther and via the connecting arm, pushes the shoe against the drum harder and harder. Really neat and very reliable. Thought you"d be interested in this. I was. Mark
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