My grandparents owned two 34 Chevy trucks set up as tractor-trailer rigs in the late 1930's. Mechanical brakes on the trucks, and NO brakes on the trailers! Later the trucks got retro-fitted with vacuum assist cylinders for the mechanical brakes, but the trailers stayed the same. They hauled beer from Milwaukee and St. Louis to Nashville. They also hauled dynamite to coal mines in east Tennessee and Kentucky, and the family owned an ice plant and a coal yard in Nashville, with a fleet of several makes and sizes of delivery vehicles.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!