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Old 03-23-2017, 02:19 PM   #1
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Stern thruster that swivels and lowers?

The other day I heard reference to a stern thruster that lowers and swivels that can propel the boat forward, and can be used incase of an engine failure.

Anyone heard of such a thing?
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Old 03-23-2017, 02:43 PM   #2
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Greetings,
Azipod drive?
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Old 03-23-2017, 02:48 PM   #3
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Greetings,
Azipod drive?

Looks neat, but seems like it's for ships and big stuff.
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Old 03-23-2017, 02:54 PM   #4
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Get a BIG electric trolling motor and put it on your swim platform?
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Old 03-23-2017, 03:05 PM   #5
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I have a Dickson hydraulic stern thruster but the hyd pump is run by the main engine.
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Old 03-24-2017, 05:50 AM   #6
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A 6+ hp outboard would do the trick , and still be of use on the dink.
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Old 03-24-2017, 06:15 AM   #7
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Greetings,
Azipod drive?
Hi Mr RTF

Yes Azipod, Prepare a buck in the far north the company ABB Ltd. And this little ship sailing somewhere in there like you Allure- and Oasis of the Seas.

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Old 03-24-2017, 09:09 AM   #8
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There was one thruster manufacturer that made a swiveling thruster...

See if I can find it later.
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Old 03-24-2017, 09:28 AM   #9
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There was one thruster manufacturer that made a swiveling thruster...

See if I can find it later.
Here's a 100hp azimuth drive...don't know about it's relevance to our kind of boating, but are used in hard working log boom dozer boats on the west coast: 360 Propulsion - Olympic Drives manufactures Marine Azimuth Drives.
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Old 03-24-2017, 09:54 AM   #10
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I've been trying to imagine how a thruster could work to power a boat if the main engine was inoperable.

A battery powered thruster wouldn't get you very far. I guess you could power it with a generator and really big battery charger. Hydraulic power from the generator?

I think it would need to be significantly larger than a thruster sized to just push the stern around.

I think there are better ways to use your generator as auxiliary propulsion.
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Old 03-24-2017, 10:02 AM   #11
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Probably why every thruster manufacturer doesn't have one.

Mote trick than treat...but does have some limited uses.
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Old 03-26-2017, 12:28 AM   #12
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Dickson Hydraulic stern thruster/get-home

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Originally Posted by Seevee View Post
The other day I heard reference to a stern thruster that lowers and swivels that can propel the boat forward, and can be used incase of an engine failure.

Anyone heard of such a thing?
Yes, Dickson Stern Thruster makes a hydraulic stern thruster that can be used as a get-home by swiveling 90 degrees and lowering. Dickson Thruster - Stern Thrusters

This article gives an extensive overview of numerous get-home systems including the Dickson system The Get-Home System: Do You Need One And What Are The Options? | | PassageMaker


Many of the Monk 36 boats have these installed either as just stern thrusters or combo thruster/get-home. They don't mention the get-home option on their website, but if you contact them they'll give you any info you need on it. It's basically the same except you need to order the special brackets that rotate and lower which are at time of this writing $650. You use a long rod that connects to the bracket in order to rotate and lower it. It can be done from the aft deck on most boats so that you don't have to climb down onto the swim step to deploy.

You can have either a single motor/prop or double for greater thrust. They show pix of both on their website.

To use it as a get home you need to run it off of another engine than your main. Typically a genset, although you could install a small Yanmar, Volvo Penta, etc just to operate the hydraulic system. Typically it is run off of the genset which also means that you would have to run the genset when docking if you want to use it in stern thruster mode.

The tricky part is determine how fast your genset will push your boat. You can first find the horsepower by consulting the specs for your genset. According to the article above the hydraulic system will transmit 80-90% of the power of the genset to the prop(s).

Then you need to find a calculator that will convert HP into speed for your boat. I used this one by Volvo Penta Find the Best Boat Engine for Your Needs: Volvo Penta Engines. It proved to be pretty accurate and the final install pushed the boat just 1/2 kt less than this calculator predicted. The only downside is that it only uses HP's that correspond to the size of the various engines that they sell. Other calculators are available that work for all HP inputs, but I have no experience with them.
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Old 03-26-2017, 07:12 AM   #13
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Yes, Dickson Stern Thruster makes a hydraulic stern thruster that can be used as a get-home by swiveling 90 degrees and lowering. Dickson Thruster - Stern Thrusters

Woof! Nice first post!

-Chris
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Old 03-26-2017, 10:06 AM   #14
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GreenGoose, Welcome aboard! Thanks for that post. I think you're going to be handy to have on this forum.
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Old 03-26-2017, 10:30 AM   #15
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Greetings,
Welcome aboard.
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