There are no calipers used with brake drums. Brake drums work with curved brake pads pressing against the inside circular surface of the drum when the brakes are applied. These pads are held in place...
The rotors in disc brakes and the drums are what the pads and shoes rub against to stop a car. With use, the surface can get grooves in it or a build up of rust scale; reducing the braking...
A drum brake looks a bit like a cooking pot that's rotating around the axle. Inside, and not rotating are two semicircular pads that can be forced apart, towards the inside surface of the pot to slow...
No, they are inferior to disc brakes. Drum brakes were used from the beginning of the auto up until the late 60s. Drum brakes are more prone to overheating than disc brakes. Disc brakes also shed...