Yep....trailer break-away systems are good. My trailer came with electric
brakes on all four wheels. I can put a car inside this trailer....you wouldn't
want to see this thing coming down the Interstate end over end. [X(]

These bigger trailers need electric brakes to help slow them under "normal"
circumstances, due to the increased stopping distances they add to a normal
stopping with a load in the trailer. Even with a light load of r/c airplanes and
related gear, the added stopping distances are really dangerous, even when
coupled to a pick-up truck or a van....which are both really on truck
chassis.....the brakes are needed for normal stops.

If you were on slippery surfaces without the trailer brakes....'yer toast.

You wouldn't want to pull a big trailer with a car in any case, brakes or not.
The smaller trailers could use brakes and break-away devices for emergency
purposes....

....but how many Guys are going to use them. The small trailer "kits" that are
available, and are commonly used for the homebuilts don't have brakes of
any kind. []

FBD.