The other thing you need to be aware of with some dual axle trailers is the
hitch height. If you lower the tongue, the tongue weight will decrease, as
the weight will be more on the front axle ;likewise, if you raise it, the
tongue weight will increase.
Now if the suspension were of the walking beam type, which I'm not sure is
common, this wouldn't be true, in fact it would be very slightly the
reverse.

"ray lunder" wrote in message
...
The new dual axle trailer is coming along. IR now a welder. I could
use some basic math help around figuring out where to place the boat's
center of balance on the trailer. (so I can put the bunks in place) If
it were exactly between the two axles then it would have zero % tongue
weight. Is this correct?
There seem to be several schools of thought around what percentage of
tongue weight is ideal, proper or even workable. Let's say you picked
10% as your goal,..
My question then is how far would you move the boat's center of
balance forward to obtain this?
Also, does going up or down hill change this? If so how do you allow
for that?
The boat is 23' on deck and approx 4300lbs if that makes a difference.
The tow vehicle is a 3/4 ton chevy with a tow package.
Thanks for your time as always.