drsteve wrote:
I would not expect four drum brakes to stop a 15K 5er as quickly as four disc brakes will stop a 6K truck. Physics is not on the side of the 5er. So the truck is going to do some extra work.
This is why brake controllers exits with gain and boost settings. The controller activates the trailer's brakes in proportion to the TVs brakes. When setup correctly, the controller will apply proportional braking forces to the trailer relative to the force being applied by the TV. The trailer's braking should be equal or greater so that the trailer does not push the truck. If it does then there's a problem with the trailer's brakes or the setup of the controller.
I have my brakes setup so that when I press my brakes the trailer gives me a slight tug. As truck and trailer slows down, you can feel that the trailer's brakes are applying slightly more braking force than the truck. When you allow the truck to do the work you increase the risk of putting the truck into a skid or a slide with jackknifing being the end result. This is especially true when on low traction surfaces like wet or snow covered pavement or loose road surfaces.