Will not, yes. For this the mainsail has to lose the wind when turning tu windward.I do not think it will work down wind. The boom is pined against the speaders.
However the YouTuber is totally incorrect about the autopilot, providing it's man enough for the job, it's the best method of steering a boat for any single hander - one does have to be careful about balancing the boat and having the right amount of canvas up - correctly set up an electric autopilot is very frugal.
The main problems with a windpilot are: a) that they can only be used on offshore passages and b) on a boat which does not surf c) they play hell with navigation if you aren't constantly checking CMG.
For most boaters involved in coastal passage making they're as much use as a chocolate spoon. But for transoceanic passages they're better than a couple of extra crew, especially in heavy weather.
I've got both, usually sail single handed for the last 22 years.
I have no idea what wind steering system you have but i have an Aeries on a Hanse 312 & you cannot have a much more directionally unstable boat than that.
So--1) i find it dead simple to use as soon as my sails are up & use it close to home most of the time so your item A is in dispute
2) i agree if you accelerate quickly & the wind is not strong as it takes the wind out of the vane but no problem on my cruiser. Useless on a multihull
3) As with all courses one tries to steer to the wind & a wind steering device does this. The navigator just has to "average" the course as they would for a human helm. It is not a problem to one with a reasonable amount of experience
4)My self tacking jib does not give me well balanced sails & i bought my Aeries because the helm was heavy. It is a fallacy that you need to balance the rig. My Aeries has more pull than a fit man can resist for long at 6 kts. True it os easier if balanced but by no means necessary
5) one of my best buys was my Aeries certainly NOT a chocolate spoon
I accept that they are not "plug & play" but once you understand how it performs it is a brilliant piece of kit
6) whilst i have a Simrad TP32 autopilot it does not cope in heavy weather as it is underpowered. I tend to use only when motoring
Like you i have been single handed sailing for years
I am intrested in self steering but have not taken the plunge, mainly because there are so many other jobs to do this year. However, I do wonder why the wind vane products cost SO much. It looks like about £1.5K for a new unit of £800 for secondhand.
I can see that they need to be well engineered but cost does seem high for the end product.
It looks like about £1.5K for a new unit of £800 for secondhand.