On very wide boats slamming can be a real issue. Particularly upwind into a steep chop these boats can be brutally uncomfortable. The only way to mitigate this is to heel the boats over far enough to get the windward chine out of the water
, which again can be very uncomfortable just because of the significant heel angle. It's a tricky balance, very much akin to flying a hull
on a multihull
. Keeping the windward side high enough to reduce slamming but still as flat as possible. The other option is to either slow down, or bear off a little bit (5-10 degrees). Which also reduce slamming, but at the cost of vmg.
Of course the trade
off is that as soon as you turn them downwind the boats are far more comfortable, and livable, and depending on design much faster.
Don't get me wrong, I am not opposed to narrow boats, or don't see their value. My objection is simply to a screening formula that isn't predictive of the real world. I am still pretty sure that Beowulf may be the best world cruising boat ever built, and she is about as long and lean as they come.
I very broad generalities there are two ways to make a boat of a given volume faster:
The first is to make the boat very narrow and very long (the longer and narrower the better) at around 10:1 L/B wave making resistance stops being a major hurdle and only skin drag limits the speed of the boat. But there are practical restrictions here, an 80' x8' boat would be a little nuts (which is where catamarans come in to their own). A practical limit for monohulls seems to fall in the 4.7:1 range, but compared to the 3:1 that is more typical of monohulls it is still a huge advantage. Up until about 20 years ago this was the only option for designing a fast passage
The second option to increase speed is to move to a wide planing hull
like the Pogo 12.50. Here the goal is to get up on the water
and start planing. This is only reasonable off the wind
, but in the right conditions can far exceed the speeds possible for a long narrow hull.
With either option there are serious advantages and serious disadvantages that have to be born, but they can each provide a boat that far excedes the sailing capabilities of a traditional hull.
The OP's boat clearly falls into the first catagory. Long, lean, and not terribly weight sensitive. She should be faster on a beat than most boats her length, and pretty quick on a reach compared to anything but a modern planning hull. She should also be reasonably sea kindly at all points. But these are generalities, not absolutes, an under canvased narrow boat will still be slow.