Hi everyone - new to the board and thinking seriously about getting a CHB 34 trawler or something similar. Wanted to know if any of you ever have an issue with rolling side to side while underway or at anchor. Thanks
Wanted to know if any of you ever have an issue with rolling side to side while underway or at anchor. Thanks
Sails can/do reduce roll from a beam sea.Roll underway can be reduced somewhat by the use of passive stabilizers-- birds, bilge keels, etc. Roll underway can be reduced quite a bit by the use of active stabilizers, most commonly powered fins.
For this question, forget the wannabee trawlers like Tollycrafts or Bayliners. Think only about non-planing vessels
For a moment pretend you own a later model Nordhavn. Being full displacement and thereby a true trawler, Nordhavns roll a lot. To counteract this rolling and as Marin said, active stabilizers and flopper stoppers are a must. A 47' Nordhavn will have about 7,000# of ballast and the 55' 9,000#. Many round bottom KKs are similar in design with ballast and stablizers utilized. Many other trawler designs like a DeFever rely upon stabilzers and lots of low weight to mitigate rolling.
During WWII, many a troop got sick by the normal 30 degree (or more!) roll of the round bottom troop carriers.
... Many round bottom KKs are similar in design with ballast and stablizers utilized...
Hobo is Krogen 42, full displacement and boy do we roll. We have paravanes which we utilize probably 80-90% of the time under way
you're going to have some amount of rocking in any boat, so savor the experience.
Art,
Get a grip. YOU DON"T HAVE A TRAWLER. You have a high speed cruiser that you use mostly as a trawler. We love you and we love your boat but it's not a trawler. Dosn't look like one and dosn't work like one. It works better in many respects.
....
And Art you don't need to have a trawler on Trawler Forum. There are quite a number here that don't. I personally wouldn't have a trawler if I could afford to go 10 or 12 knots.
But I don't have an ACTUAL trawler.
For this question, forget the wannabee trawlers like Tollycrafts or Bayliners. Think only about non-planing vessels
For a moment pretend you own a later model Nordhavn. Being full displacement and thereby a true trawler, Nordhavns roll a lot. To counteract this rolling and as Marin said, active stabilizers and flopper stoppers are a must. A 47' Nordhavn will have about 7,000# of ballast and the 55' 9,000#. Many round bottom KKs are similar in design with ballast and stablizers utilized. Many other trawler designs like a DeFever rely upon stabilzers and lots of low weight to mitigate rolling.
During WWII, many a troop got sick by the normal 30 degree (or more!) roll of the round bottom troop carriers.
Any boat, without stabilizers, driven slow will roll unless the water is flat. Slow boats used in open waters especially with a wife onboard can greatly benefit from stabilizers. My 2 cents worth.
Nobody here has an ACTUAL trawler unless they happen to have a trawl net rig on board and know how to use it.
Art,
you were touching on something that is not understood by myself, but I've heard mention of it and noticed it from time to time over the boating years. A boat that is planing (or slightly planing) has an advantage over the disp boat in that it has a dynamic hydrodynamic element of stability that the wallowing (by comparison) disp boat lacks.
Art
I'm surprised you beat K Saunders to the reply button. The OP was asking about trawlers and rolling. You are happy you don't have a rolling trawler and instead have a purported rock solid in all weather Tolly. I'm OK with that and even from time to time read the Tolly owner's forum where I can read about one of my favorite non - trawlers. Some on that Forum are so bold as to claim they are a much better build than a Bayliner.
Yeah Art I was expecting Marin to chime in with that! I happen to like my faux trawler self contained power boat. I think you have an awesome boat and Eric's is ok too, for being wood and all. . LOL.
I'm not sure I agree with what Mark said that trawlers roll no more at anchor than single-hulled sailboats. Our center of gravity is higher than most sail boats and we are living higher up in the vessel most of the time. Even though we have 2,500 lbs of ballast it sure feels like we roll a lot.
OK - to summarize - It appears the general consensus (with exceptions) is the a well designed hard chined planing hull is more stable at rest than a soft chined displacement hull. Also - in average-good conditions, the same planing hull has less roll traveling at speed than a displacement hull traveling at 6-8 knots.
The reverse is true when the weather turns really ugly and the planing hull must slow to displacement speed. In this situation, a well designed displacement hull is much better equipped to ride out the storm, whereas the planing hull operator should read the changing weather and use its speed to get to safe water.
Have I got this right?