It seems all the brands want to stick with 1.75ish m beams. Which to me is a small beam for a 14ft boat, old school. Which also means a tiny internal beam, barely big enough for 1, 2 max to fish comfortably. Even my last RIB of 14ft had 2.1m beam.

And before those that still believe pontoons equal stability, you are wrong. Its beam and hull shape. Its the pontoon acting as a gull wing, almost tri hull if you like that gives the pontoon boat the stability.

But id really like some more internal room in a pontoon boat. The 435 aqualine lists 2mish beam, but i dont like their anchoring layout, or lack of. Im looking at cuddy cabs.

The blackdog cats are the best but they are out of my price range for equivalent size.

If I had the coin id step up to an f16 or similar but I just dont.

Any wide beam pontoon allys exist?

FizFisho wrote: It seems all the brands want to stick with 1.75ish m beams. Which to me is a small beam for a 14ft boat, old school. Which also means a tiny internal beam, barely big enough for 1, 2 max to fish comfortably. Even my last RIB of 14ft had 2.1m beam. And before those that still believe pontoons equal stability, you are wrong. Its beam and hull shape. Its the pontoon acting as a gull wing, almost tri hull if you like that gives the pontoon boat the stability. But id really like some more internal room in a pontoon boat. The 435 aqualine lists 2mish beam, but i dont like their anchoring layout, or lack of. Im looking at cuddy cabs. The blackdog cats are the best but they are out of my price range for equivalent size. If I had the coin id step up to an f16 or similar but I just dont. Any wide beam pontoon allys exist?

Stability when swamped is the main benefit of pontoons/inflatable tubes. Underfloor floatation/decks above waterline need to be matched with a very fast method to get water off the boat. 

Those VMGs look very much like my Smartwave. Very pronounced reverse chine.

A simpler way to see it is imagine what would happen if we cut the tops off the pontoons. The boat would not become less stable in normal use. But its stability in a swamping would be much decreased. When designing boats it is recommended that as much as possible floatation be placed high up and near the edges of the boat. 

yep. or a gull wing, not a down turn, but a flattening out both sides of the stern deadrise or in fact a completely flat stern (old school)

thats why at 4m the FC boats with a 2.01m beam and a gull wing rear are likely more stable than a 14ft stabi or frewza at 1.7m.

people will say, but stand on my sides and it doesnt move, well try standing another 20 cm and thats where the FC boats gunnel would be. the majority of the time people are standing in very small internal beams giving and ultra stability feel.

pontoons should be sold on safetly not stability imo. they float when swamped and are les likely to roll if swamped. now if you are taking your family out in those conditions, that would raise a question for me first. of course we all get caught out by mother nature so the pontoons have that safety for the inexperienced and one in a... time the weather changes.

interestingly the 4.3m kiwikraft is aqua is the only pontoon i can find with a semi large beam.

out2sea wrote: Sorry it may have been written in here already but ill just add what I can from 6 weeks of naval architecture. The stability comes from the shape of the hull in the water, buoyancy comes from the water displaced by the hull.  The only time when sealed pontoons will make a difference is when the boat is flooded and the pontoons displace their volume of water creating the added buoyancy. The stability in a pontoon boat obviously comes from the large gull wing style hull they create, although that doesn't equate to a great ride. so there are compromises between stability and ride in every boat.  you could quite easily have a standard mono hull that is more stable than a pontoon boat but it would likely have greater beam or a flatter 'v' which in turn would create a harder or harsher ride and change the boats handling characteristics. So most boats are built for a best of both worlds scenario which does mean they seem to follow a hull length to width ratio, I guess that is why most boats of a similar length have a similar beam.

One way traffic - I checked Mac Boats website and internal beam of Mac 420 is 1.7M as 0.5M is pontoon which is fizfishos point - though I'd rather have the Pontoons and it feels wide enough to me.