Join Date: Jul 2008
Location: S/V Waltzing Matilda, Port Ludlow, WA (NW Puget Sound)
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Re: Modern Hull forms and Motion Comfort
I agree with you. It's the same problem with have with lots of things these days, i.e. "my way or the highway". It's too easy and convenient to just jump into one camp and buy their total argument, "Old is bad" or "Good is bad". It's a bit more complicated than that.
Some smart person may be able to write a formula that balances motion comfort against VMG. I think of it like this:
If I were on a long passage would I be willing to give up some motion comfort for boat speed if it meant that I arrived at my destination 3 days ealier? A week earlier? Ok, let's compromise and say 4 days earlier. That's four days in a snug harbor on the hook with access to fresh groceries and cold beer. That sounds comfortable to me.
And when you discus bows you MUST take it out of the relm of 2D geometry. We are nt talking about flat plane bows cutting through flat plane waves. Bows are volumes, not 2D planes, and it is possible to have a sharp angle of entry and volume forward at the same time.
But I'll be the devil's advocate here. There is this tendancy to cling to the old like we will will never have it better. That's silly. When I was 27 years old I designed the Valiant 40 and proved that new can be very good. I was ridiculed and attacked. John Neale attacked me. Ray Richards attacked me. It's a long list. It's hard to break loose from the past. But I prevailed and the "radical" offshore cruising boat I drew back then is now considered ultra conservative. Times change. Best to be ready to change along with them. Or not. Me? I'm a hog for good performance.
What about a compromise: an "antiquated design" that has comfort, ease of use, is sea kindly has an nice motion but is also fast (actually faster than the "fast modern designs" when it gets really dicey).....I have that in my boat. My boat has over 40,000nm of sea miles, the hull design was fast and the second owner made a few tweaks to make the rig faster and easily handled for single handed passage making. A friend of mine likes to try and balance modern high performance with simplicity once told me the problems with my rig...but later comented on how well I point, how balanced the rig is, how well it does in light air, he went on to point out that as the wind pipes up I start to leave the "plastic boats" in my wake and when it gets really dicey it is an extremely safe/comfortable boat to be in.
Granted there are alot of boats out there that can't get out of their own way in a light air that have given "old designs" a bad name, but this same characteristic also applies to new boats that were designed more to be weekend condo with a stick in them.
Last edited by wolfenzee; 04-08-2013 at 01:57 PM.