On Feb 7, 6:24*pm, wrote:
On Sun, 7 Feb 2010 16:17:25 -0500, I am Tosk





wrote:
In article ,
says...

On Fri, 5 Feb 2010 14:15:22 -0800 (PST), Tim
wrote:

That's a good reminder on using common sense. *Ive seen people out on
my favorite lakes that will have a 24' pontoon boat with about 25
people on it. it's so bad the the pontoons are about under water.

One thing about a pontoon boat is they have about the same buoyancy
with the pontoons under water as they do with them riding high and
dry. They still have the same amount of displacement.

OK, educate me Terminology aside please, do the pontoons become more
buoyant or get more lift as they descend deeper into the water? Or once
the thing is completely submerged, does it remain the same regardless of
depth.. Oh, and why?

Scotty

Buoyancy is basically displacement.
A 20' pontoon boat with 24" tubes will displace about 8000 pounds of
salt water. Even when it is pushed completely under it is still
pushing up with very close to that 8000 pounds (only minus whatever
compression might do to the pontoons). If you have a total load of
7999 pounds it will still be barely floating. Although that is a
theoretical number I have seen them where people had to carefully trim
the load to keep a corner of the deck out of the water. In the end
they finally dunked the engine and had to get towed home.
By then they had drunk enough beer and ****ed it over the side that
they were a little higher in the water
*Any open boat gets most of it's floatation from the fact that the
lowest opening hull is above the water *line. Once you get the
scuppers under, a self bailing boat becomes a self sinking boat.- Hide quoted text -

- Show quoted text -

Thats a good explaination. I wished I'd read your post before I made
mine.

On Feb 7, 11:52*am, wrote:
On Fri, 5 Feb 2010 14:15:22 -0800 (PST), Tim
wrote:

That's a good reminder on using common sense. *Ive seen people out on
my favorite lakes that will have a 24' pontoon boat with about 25
people on it. it's so bad the the pontoons are about under water.

One thing about a pontoon boat is they have about the same buoyancy
with the pontoons under water as they do with them riding high and
dry. They still have the same amount of displacement.

True, but when the aft of the deck is on the water, that's when I
think there's a bit too much weight up top. I'd hate to see all those
people and loaded coolers shift to the back, especially underway with
a churning prop.