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Laser 13 rig settings

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Sam.Spoons View Drop Down
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Topic: Laser 13 rig settings
    Posted: 10 Apr 22 at 6:20pm
I agree, a little weather helm is good, ideally not much when the boat is flat (that said most people don't keep the boat flat enough, me included).
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 22 at 6:32pm
I have found that I think I am keeping flat, but when you look at a video, nothing like flat, even using a bubble indicator. Difficult to keep up the concentration in a blustery strong wind, I am too busy sailing the boat, so, Sam is right, very rarely can you do anything other than trying to keep flat hence a touch of weather helm, I think it gives you quicker feedback on what the boat is trying to do, just my opinion though.
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Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 22 at 6:44pm
There’s one reason why weather helm is good - having the rudder at a small angle of attack means that it is generating lift as well as the centre board -a bit like a gybing board .So a few degrees can be good. The reason why some sailors have weather helm as it gives them “feel “ this feel is often at the expense of boat speed as it adds drag-so if you develop better “feel “ by having a more balanced set up you can sail with a lighter helm (which is faster!)
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 22 at 9:29pm
The more vertical the rudder the less 'feel' you have (or the lighter the rudder, it's one of the reasons why I dislike the Laser) but having a vertical or balanced rudder does not affect 'weather helm' as such it just reduces the effort required to combat it. A boat with too much weather helm will mean you need to angle the rudder to correct it which is slow. Weather helm caused by not keeping the boat flat is the usual cause but if the boat is unbalanced even when flat you still have the problem of the angled rudder acting as a brake.
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr 22 at 6:12am
Does the weather helm create the same amount of drag as rooster tail?
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Rupert View Drop Down
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr 22 at 7:35am
Weather Helm- when you fall over in the boat, do you want it to round up towards the wind, or bear away and speed up? It's to do with where the centre of lateral resistance is compared to the centre of effort.
Nothing to do with rudder shape or angles. If you sail heeled, it is hull shape causing the boat to round up, meaning you have to counteract by bearing away the "weather helm" the rudder feels. In a yacht designed to be sailed heeled, the rudder will be neutral at the designed angle of heel, if the designer got their sums right.

In a Laser 13, the mast position is set, so mast rake will alter your CofE, so with no cheat sheet, trial and error will give you your answer, though I doubt a couple of holes on a chain plate will make much difference.
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Sam.Spoons View Drop Down
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr 22 at 8:44am
Originally posted by Rupert

Weather Helm- ... 
Nothing to do with rudder shape or angles. If you sail heeled, it is hull shape causing the boat to round up, meaning you have to counteract by bearing away the "weather helm" the rudder feels..

This was my point above, but the effect/feel of weather helm is dependent on the shape/angle of the rudder, basically how close the CoLR of the blade is to the pivot.
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr 22 at 8:32pm
A nice barn door rudder will turn a slow, heavy boat nicely where a narrow blade would simply not have enough bite.
Still doesn't explain why the Laser will happily change masts, sails and controls, but not the rudder. Should have done it 49 years ago.
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr 22 at 10:11pm
Originally posted by Rupert

A nice barn door rudder will turn a slow, heavy boat nicely where a narrow blade would simply not have enough bite.
Still doesn't explain why the Laser will happily change masts, sails and controls, but not the rudder. Should have done it 49 years ago.

^^^ This...  LOL
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Sam.Spoons View Drop Down
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr 22 at 10:14pm
Actually just allowing the blade angle to be free would be a virtually no cost mod that would improver the feel of the boat immeasurably.
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