What kinds of brakes have you put on trailers?
not personally..
since I have a trailer with 2 standard front hubs in it, supported from both ends .
I could fit 2 front drum brake hubs , in wheels built for the purpose .
there are double cable pull brake levers .. a bit of clever engineering can make
a surge actuated scheme
to not have to run 3 levers so the bike stopping makes the trailer brakes come on.
surge system , hitch linkage, will rely on he weight in the trailer putting on it's own brakes ,
as it pushes the towing vehicle, such as going down a hill , or the tow rig slowing down.
there are single sided drum brake hubs made too, for tadpole trikes , like Greenspeed
they used to modify their own , now S-A Sun Race does that. for builders of those kinds of rigs.
Want hydraulics? magura's hydrostop Rim brakes would lend themselves to this use,
because ..
they are a closed system, no expansion tank, so ..
one lever master, goes to 1 caliper , as they are there is a balance tube to the 2nd slave piston
on the wheel .. then they work together to squeeze the rim .. Sooo ..
Daisy chain, you use the Bleed connector on the
2nd piston as a supply line to the other wheel ,
and its balance line then has the Bleed connection at the end of the whole thing ..
and all 4 pistons will close at the same time because they are all in the same line of fluid.
standard V brake mounting for the slave pairs
[I've seen (web pictures) the use of dual control on the lever end, HS 77 was a Road bar lever ,
the daisy chain had a regular HS33 straight bar lever interrupter like ,
in the middle of the fluid hose, and so either lever would push the brake fluid pressure..
down the hose.
BTW Goodwood Dry hydraulic Quick connectors are already used for Hydraulic braked S&S tandems and such ..
a trailer hitch connector is possible .
[Update] LBS built up a drum brake Hub based Braking scheme for an Elk Carcass Hauling trailer , for a hunter.
Used 3 cables , thumb lever on the bars, cable splitter , to the 2 S-A drum brake hubs..
trailer owner brought it in with 2 long reach side pull brakes but couldn't get it to work well..
'/,