Were 1984 Kayot 24' pontoons chambered?

[Winats2]

The photos I've seen from that year and the one before don't seem to show vertical welds on the pontoons, except at the front nose section. Did Kayot not chamber the pontoons at that time, except right at the nose?

I've read of U-shaped foam filled pontoons, pontoons made up of separate airtight chambers, and pontoons that are a single hollow pontoon in which air circulate throughout the pontoon.

Wondering whether the Kayots of 1984 were the latter.

 

[Winats2]

Re: Were 1984 Kayot 24' pontoons chambered?

Saw one today in person and it had one vertical seam in the center, one just before the front cone, and one just before the tail cone.

 

[Bamaman1]

Re: Were 1984 Kayot 24' pontoons chambered?

U shaped toons are filled with a foam that gives them structure and floatation. They don't have chambers. My 1985 Starcraft has UTubes, and it's very buoyant and seaworthy.

Only round tubes have chambers. The metal appears a little thicker in them, and they appear more expensive to manufacture.

Only one manufacturer seems to be making U Tubes at the present time. I don't know about the newer Kayots.

 

[5150abf]

Re: Were 1984 Kayot 24' pontoons chambered?

For every section of the tube there will be a chamber with a baffle but that doesn't mean they are air tight, I have heard of some companies that have drain holes in them so if your tubes have a drain at the back you have baffles with holes if not there should be at least 3 air tight chambers, nose cone-front section and rear.

 

[Winats2]

Re: Were 1984 Kayot 24' pontoons chambered?

A maker tried to explain that system to me. Their thinking seemed to be that if a compartment leaked, and water flowed through the drain holes in the bottoms of the bulkheads into the other compartments, once the water level reached the tops of the drain holes, the air in the compartments would prevent more water from entering them. I guess because the air is lighter than water and won't move downwards through the water. Seems to mee that high enough water pressure would overcome the weight difference. But I don't know the math and I suppose they do.

I was wondering because the Canadian regulations for calculating maximum number of people on the boat use, "Vlc = volume of largest compartment, in cubic metres, defined as the largest volume between separation bulkheads (L4) in any pontoon".

Seems to me that a maker using a very large compartment Ina pontoon, or only one compartment other than the nose cone, wouldn't get a very high maximum number of people score.

I think the regulations also allow common practices, so maybe that is the way those makers do it. Or they read the rule as not requiring water tight separation. The foam filled ones must have a different calculation because they can't flood.