Easy way to reduce rolling on bilge-keeler?

There are other forums that absolutely embrace this level of personal animus and absolute insane volume of semi coherent rambling. Even on ignore your capacity for keyboard diarrhea had hijacked another thread. Another thread that should be an interesting read turned into a mess.

 

So now here you come repeating my words hijacking thread used for the few selfrighteous denialists throwing random bias >to my comments<

This is your contribution to this thread, some regurgitated nonsense trying to make a fake case

 

I didn't quote, it was no regurgitation. We're two pages away from useful information, at this stage of the game it's mighty rich of you to complain of my hijack. There was a hope of a thread solving or at least minimizing the original posters rolling. Inevitably you show up with tangential at best opinions veiled in all manner of bizzare personal attacks on anyone with a contrary opinion. I'd like to go back to reading a lively debate on solutions.... instead of a treatise on whatever personality malignancy you force on us to read.

Your the death of interesting threads, which after folks get tired of will lead to decreased engagement on the forum. Decreased readership is the death of forums, this forum is something I'd like to see continue.

 

Omg you should read the list of cognitive bias on Wikipedia because you may be coming here as a jaws movie fisherman wannabe trying to be "leader" in front of some sheep peer people that doesn't know each other, but fishermen are a tragedy and fake working class trying to scapegoat marine life to bring a "tough" pose and you are a traitor both to class and nature being also a sellout and fake hero wannabe.

I have fished with plenty of decadent people and learned to fish way more you would ever dream all types of fishes and techniques because closed minded people welcomed me when i was only interested in give them company and i stopped fishing by myself when i realized how coward it is, just a cousteau and fishing gear marketing propaganda while being respected by fish while freediving is on the biggest honours while on the land is full of deranged people like you that wouldn't see a flying pig in front of their eyes just by doing pose and repeating mantras

Get out of my lap, ignored forever and I have helped the op to understand the rolling issue while other posters have also contributed

 

This is simply not appropriate for the forum here.

After warning you in the other thread, an effort was made to not ban you and instead delete posts that were inappropriate with a warning note in your alerts, but so many of your posts bring out the worst and take threads way off topic, insulting multiple other members and groups of people, it's just not workable with the continued jabs and insults.

Best wishes in your future endeavors regardless. Sorry that your posting style simply does not work on the forum here.

 

Thank you Moderator for this decision, enough is enough!

 

Indeed.
Thank you for removing the poison from this site.

 

Now that the haze has cleared, what about paravanes?

 

Another dumb guy question… is there any chance the mast has been redone at some point and was done wrong? I apologize in advance that I cannot provide the work, but I seem to recall the top of the sailboat is as important as the bottom.

Have you done an estimate of the roll period?

There was a great bit done on it here.

How To Decrease the Rolling of an Existing Vessel https://www.boatdesign.net/threads/how-to-decrease-the-rolling-of-an-existing-vessel.65600/

I think paravanes are for powered vessels and probably not heeling boats, but I’m not 100% sure on that.

Another thing that has been discussed here is putting tankage near the outside of the hull and near the waterline to dampen, iirc.

 

To address the question of the pendulum effects of a bulb keel, here's a video of a casual experiment on how pendulums behave in water.

As is obvious, the water has a strong dampening effect, but the pendulum does work.

This is a more formal paper written about underwater pendulums.
Fluid–structure interaction between a pendulum and monochromatic waves - ScienceDirect https://www.sciencedirect.com/science/article/pii/S0889974620306605
As noted, the period is greatly increased but the viscosity and surface resistance dampen the amplitude very quickly. In the case of wave driven pendulum motion, this would be a driven oscillation and timing is everything here.

However, I don't imaging a bilge keeler would suffer very much from the pendulum effect, and the lateral water resistance of a keel, even a narrow fin keel, would probably make pendulum motion a non-issue.

Fallguy's thoughts on mast and high altitude structures would likely have a much greater pedulum effect.

-Will

 

I think you also ought to create some numbers to take some guessing out of the game. I do profess google expertise here, but some of the wiser contributors can maybe get back to square after all the nonsense this way.

DIY Stability Check? - Practical Sailor https://www.practical-sailor.com/safety-seamanship/diy-stability-check