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Old 19-05-2019, 11:58   #16
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Re: Hydrovane and sagassum weed.

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Originally Posted by hasse_A View Post
Are you serious ?

We are mostly 1 person on watch. How in the world could you expect that person to do that manoeuvre in the middle of the night on a cruising boat where everything is set up going down wind with genua poled out ?

If you are forced to head up into the wind you can of course do that but that is
not a routine manoeuvre putting excessive force on your equipment.

/Hans
You are fortunate in that your keel and your primary rudder will self shed the weeds, many boats do not have such long keel configuration and are prone to fouling their bottoms. Sailing in reverse is the common procedure as their undersides are hard or impossible to clear without going into the water and diving to untangle. Sailing in reverse is a very handy procedure to maneuver in a marina or a mooring field [say to pickup a ball] or to make a rapid / emergency stop or to pickup a object or person that has fallen over. I have had to go under boats to remove fouling when at sea, not a lot of fun if the conditions are anything other than calm, e.g., crab trap lines, and seaweed. Cold swimming off the northern California coast.

As to your present configuration, I would recommend just put a kick up rudder on your exposed, off center hydrovane, either one that will trigger by itself with an adjustable amount of force [weighted or spring biased] or one that you simply rise manually. Loads of designs for such on the internet both custom and production models. Alternatively to using a kick up version It seems one could modify a vane so that it rises vertically and the rudder is caused to be brought straight up and out of the water.

A steep rake angle forward of the rudder may aid but I suspect the buoyancy of the weeds will counter the downward drag to a considerable extent and such straight in line device will counter the steering of the vanes rudder and even your primary rudder

My mid-sized sailboat has a swing keel and a swing rudder. I should put an electric winch on the keel so as to ease its lifting as it is physically a hard go to raise with the manual friction winch and even the long, heavy rudder takes considerable effort to raise to be parallel or above the surface of the water. But swinging the keel and the rudder up readily avails untangling and also avails ungrounding, and or purposefully beaching and of course navigating into the shallows.
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Old 19-05-2019, 12:36   #17
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Re: Hydrovane and sagassum weed.

Okay so you have a weed proof primary rudder with a tiller.

Ditch the Hydrovane and the exposed auxilliary rudder go with a self steering using your primary.

Example:

Freehand Steering System - AndersonBoatworks
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Old 19-05-2019, 13:48   #18
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Re: Hydrovane and sagassum weed.

I clean growth off my hydrovane with rags tied to a long fish gaff. My Hydrovane is fairly close to center and Blind Faith has a large primary rudder on a skeg. We have never picked up floating weed that I have seen.
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Old 19-05-2019, 13:58   #19
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Re: Hydrovane and sagassum weed.

I have a Monitor wind vane and itís the exact same problem. I use a pole to clean it off when itís fouled up. I was thinking to attach some sort of very sharp blade to the leading edge of the in water part in hopes it might cut the weeds when it comes in contact.
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Old 19-05-2019, 14:07   #20
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Re: Hydrovane and sagassum weed.

Examples of trim tab self steering wind vane systems. The trim tab is controlled by the windvane and the trim tab then steers the primary rudder.

If the primary rudder is resistant to fouling then so should the same rudder with a trim tab that follows immediately aft of such rudder. The closer the trim tab to the aft end of the rudder the better so as to avoid a gap between the trim tab and the rudder into which seaweed can intertwine.

http://http://www.cruisersforum.com/...-a-109982.html

https://www.sailboat-cruising.com/im...ppoTrimTab.jpg
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Old 19-05-2019, 14:14   #21
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Re: Hydrovane and sagassum weed.

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Originally Posted by hasse_A View Post
Well, our autopilot uses the Hydrovane. We have the smallest Raymarine 1000+ which workes fine and draws very little power but suffers the same problem with weed.

/Hans
I have been considering this option with my Hydrovane, trying to decide on the St1000 or 2000. How heavy is your boat, and would you know how much power the 1000 draws?
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Old 14-08-2019, 09:49   #22
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Re: Hydrovane and sagassum weed.

Can you create a simple tool - maybe on a pole - that makes clearing the weeds painless?
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Old 14-08-2019, 14:52   #23
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Re: Hydrovane and sagassum weed.

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Can you create a simple tool - maybe on a pole - that makes clearing the weeds painless?
More weed this year north of Bermuda than Iíve seen in the last few years. I have a Monitor vane and the couple times the weed tried to hitchhike I just poked it free with my boathook. No big deal.
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Old 18-08-2019, 05:29   #24
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Re: Hydrovane and sagassum weed.

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Can you create a simple tool - maybe on a pole - that makes clearing the weeds painless?
Its sounds good but in reality very hard. I have a Hydrovane and coming up from Brazil it was covered with this weed, tried to use the boat hook to get it off but it's just not that easy when sailing along at 6 knots plus.
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