As far as I know displacement = weight.


Ante Topic Mimara said:
Somehow, this doesn't sound right to me.

Dave wrote:
It is.

Sorry to disagree yet again, but it's not that simple. It depends very
much on whose figures for displacemnt you are using, and their intent.

The designers figure for displacement will be the boat's intended
immersed volume, converted to units of weight since water density is
relatively consistent. This will include the boat & all it's parts... it
usually but not always includes full water & fuel tanks, crew, and some
amount of supplies. In other words, the boats actual weight when in use.

The builders figure for displacement can be the same as the designers,
or it could be the actual weight of the boat as built, plus a
guesstimate of how much "stuff" it can reasonably be loaded with for
sailing... or it could be a fantasy intended to create a false
impression of good performance on potential buyers. Lots of times
builders start changing the design and end up with a boat that is
substnatially heavier than the designer intended.

Sometimes a "half-load" displacement is quoted, meaning what the boat
would weigh in the middle of a cruise.

In any event, since the post is intending to trailer the boat and needs
an accurate number for that purpose, it would be a really good idea to
simply weigh the thing. The displacement figure would be a good starting
guess, but it won't put Humpty Dumpty back together again if it turns
out to be wrong by a lot.

FB
Doug King