afidel wrote:
troubledwaters wrote:
RoyBell wrote:
...Those light F150s weight how much? 5000 lbs? The trailer weighs almost double the TV. That's the equivalent to towing a 21' TT with a mini.
Would that be equivalent of a 20-foot, 20,000 lbs tractor pulling a 45-foot, 80,000 lbs (quadruple the TV) double bottom gravel train? Done every day in Michigan at highway speeds. Some states like Ohio can have 3 trailers.
Only on the turnpike (thank god) and the tripples still have to fit into weight and length limits so their useful payload is actually lower. The only companies I see using them are logistics companies where the routes are relatively short and the cost of labor to repack trailers is high.
Actually, the limit in Michigan is 164,000 lbs, if the truck has 11 axles. ;)

But they're not bumper-pulling those loads, and the doubles/triples are true trailers with front axles, not semitrailers.
Bumper-towing adds in more instability, so you need a lower ratio of TV/trailer weight.