Hydrolic assist if you run aground. - SailNet Community
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post #1 of 17 Old 08-04-2014 Thread Starter
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Hydrolic assist if you run aground.

I was reading some of the stories on here about running aground. It made me wonder if anyone makes a small device of some kind with a little hydraulic ram on it like a foot of some kind that would get some traction on the shore and a rubber bumper to place on the hull and push. Maybe a little floating device with a gas engine you could lower in between the boat and the shore.
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post #2 of 17 Old 08-04-2014
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Re: Hydrolic assist if you run aground.

We installed a couple of dozen small wheels from skateboards and we just power over any island or reef that gets in our way.

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post #3 of 17 Old 08-04-2014
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Re: Hydrolic assist if you run aground.

I hear that Rube Goldberg has some good designs.
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post #4 of 17 Old 08-04-2014
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Re: Hydrolic assist if you run aground.

Paul there have been several ideas that have been tried.

Not so much going aground but some full keel boats with tall bulkhead will bold a 4x4 to each side with a flat pad on the bottom so the boat can dry out at low tide.
It gives the boat a couple of legs to prevent it from tipping over.

There have been some commercial floating water-wings that you put under the bow or stern then inflate to lift your boat up. Saw them for sale never saw then used.

The old standby of course is a backhoe. It can be used to dig a trench then to push the boat while a tug pulls. I've seen the video of that process.

The first thing someone does when aground is to use the dinghy to run an anchor out to seaward.

That keeps the boat from being washed up higher on the beach.
Sometime with constant tension kept on that line the boat will work free.

Your idea might help in conjunction with the seaward anchor. It is the kind of idea where you you have to evaluate the situation and go home to get the right gear. It is highly unlikely you would be willing to carry the proper timber etc in the unlikely event you would need it and that the material you brought would be just right for the circumstances.


If you have a hydraulically operated center board then of course the solution might be easy in a soft grounding.

Let me know how you would have used your method to float this boat?
https://www.youtube.com/watch?v=tBVkbsf6p-k

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Last edited by davidpm; 08-04-2014 at 06:52 PM.
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post #5 of 17 Old 08-04-2014
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Re: Hydrolic assist if you run aground.

I think that must have been extremely soft, loose sand or the video was digitally altered?

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post #6 of 17 Old 08-04-2014
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Re: Hydrolic assist if you run aground.

Pretty much all of us have run aground more than a few times without needing to resort to any special inventions. There are enough other things to spend your time, money, and storage space. Coming from the Great Lakes I never realized how useful tides are for getting unstuck.

Back home on Lake Ontario after something over 36,000 nm circumnavigator. Not surprisingly there is a lot of stuff I want to get done on Ainia both cosmetically and functionally. Getting an early start so it will be ready to go for next summer (Lake Superior?).
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post #7 of 17 Old 08-04-2014
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Re: Hydrolic assist if you run aground.

Quote:
Originally Posted by killarney_sailor View Post
Pretty much all of us have run aground more than a few times without needing to resort to any special inventions. There are enough other things to spend your time, money, and storage space. Coming from the Great Lakes I never realized how useful tides are for getting unstuck.
Except when you get stuck at high tide.

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post #8 of 17 Old 08-04-2014
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Re: Hydrolic assist if you run aground.

Easy to say that when you are perched on a pinnacle on a 6 meter tide with 30 meters under your rudder and maybe won't float till Febuary.Always travel on a rising tide.
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post #9 of 17 Old 08-05-2014 Thread Starter
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Re: Hydrolic assist if you run aground.

[quote=davidpm;2068161]Paul there have been several ideas that have been tried.

Not so much going aground but some full keel boats with tall bulkhead will bold a 4x4 to each side with a flat pad on the bottom so the boat can dry out at low tide.
It gives the boat a couple of legs to prevent it from tipping over.

There have been some commercial floating water-wings that you put under the bow or stern then inflate to lift your boat up. Saw them for sale never saw then used.

The old standby of course is a backhoe. It can be used to dig a trench then to push the boat while a tug pulls. I've seen the video of that process.

The first thing someone does when aground is to use the dinghy to run an anchor out to seaward.

That keeps the boat from being washed up higher on the beach.
Sometime with constant tension kept on that line the boat will work free.

Your idea might help in conjunction with the seaward anchor. It is the kind of idea where you you have to evaluate the situation and go home to get the right gear. It is highly unlikely you would be willing to carry the proper timber etc in the unlikely event you would need it and that the material you brought would be just right for the circumstances.


If you have a hydraulically operated center board then of course the solution might be easy in a soft grounding.

Let me know how you would have used your method to float this boat?

I think it would work but probably slowly. I imagine you could bury a two by six about four fee to five feet long in the sand and push off of it or some such thing. Not sure how he got the boat back in the water as it doesn't show what pulled it. It's better if you can get a tug or something but if no help is around a thing like I'm thinking of would definitely be a help.
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post #10 of 17 Old 08-05-2014
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Re: Hydrolic assist if you run aground.

Assuming your hydraulically operated center board was completely in the raised position when you run aground.....how would you use it to refloat the boat? Or should you keep it down about a foot as you're cruising in shallow water just in case you run aground...you can raise it?
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