Originally posted by cwglee
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I'd note I have a tandem axle 14k flat bed (20 ft.); a tandem axle 14k dump trailer (10 ft); a tandem axle 7k flat bed (16 ft.); a 10k TT (36 ft.) and have tested towing these trailers with different loads and measured tongue weights to see where each likes to tow. The longer the trailer the more susceptible to wig wag the trailer is, but they all start towing poorly with the tongue weight less than about 7-8%. The TT is almost untowable at less than 7% and likes to tow with about 12-13%. Even the short dump tailer has worse towing characteristics when the dirt is loaded such that there is not enough tongue weight but you can get away with less than the TT.
Boats are not as easy to test different tongue weights because it is not as easy to adjust the load. But I would need to see some evidence that boats somehow tow better with less tongue weight than other types of loads or that they are less prone to wig wag with say less than 7% tongue weight. I can see a trip axle trailer needing less tongue weight if the trailer is shorter and the load is lighter, but I will remain skeptical without seeing some evidence that 10% is not ideal or that they somehow tow better with say 5% on the tongue.
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