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Old 04-20-2015, 03:25 PM   #41
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Originally Posted by No Mast View Post
We had our old 43 ft'er for 5 years before we added a bow thruster. We did not notice any performance difference. And that was a light boat, I would have expected if there was a difference to notice, it would have shown up.
Thanks...I had always assumed because I had never heard differently that a properly faired tube and slowly driven hull wouldn't really feel any effect.

I would think a 1/2 knot or so diff would be the godsend to selling stern thrusters and most manufacturers would start with them rather than start with bow thrusters.
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Old 04-20-2015, 03:51 PM   #42
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Hi StarSide,

Good luck as you proceed to learn. I picked up on your comment about glassing the bottom of your classic boat. Here is a thread with useful information in that regard:
glassing a carvel planked hull (again)

Cheers
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Old 04-20-2015, 05:33 PM   #43
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Starside...
Thought I replied a day or so ago but don't see it???

First - nice job on the refurbishment - certainly a great looking boat!

I've had both single and twins w/o thrusters - recently went back to a single but the one we bought had both bow & stern and handling is a pleasure. Ive thought about it and wonder whether I would have gone through the trouble & $ of adding either if it didn't have it to start... not sure... I think I'd do exactly what you are doing... try it and see if practice gets you to where you are comfortable.
I think having thrusters has given me the confidence to use the boat more w/o any doubts and by having the thrusters (to fall back on just in case) has allowed me to practice more w/o using them. I have gotten better w/o them AND like having them in case conditions warrant the assist and/or I encounter unanticipated conditions w/ wind / current.
Like many things - now that I have them I'd hate to give them up... makes life easy and pleasurable...
I assume you have looked at the "bolt on" bow thrusters - no first hand experience but seems like they would be worth a look given your relatively slow speed.
One suggestion I would add is that I have found that in some situations (home port dock) it is more beneficial to add protection on the dock than fenders on the boat - how about a rubber roller for the dock corner you mentioned??
Rubber strips, rollers, fire hose, etc... can help avoid damage from a bump.
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Old 04-21-2015, 09:33 AM   #44
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Hi StarSide,

Good luck as you proceed to learn. I picked up on your comment about glassing the bottom of your classic boat. Here is a thread with useful information in that regard:
glassing a carvel planked hull (again)

Cheers

Thanks for this info. Starside is only glassed below the waterline & it was done by another owner over 10 years ago.

My understanding is that glassing old boats requires great skill, but when done right, it is a life saver for the boat & ensures longevity. In fact, many boat yards have said that my glass job is 'the best they have ever seen.'

I had the same reservations as you did when I first got her. I thought it was hiding something. But then I found out that Starside was in a museum restored by a famous boat builder & designer, Rand Spaes. His restoration was top-notch of all his boats. Honestly, I was lucky to get her.

At my present yard, they inspected the glassed bottom & found no flaws. They said it was an exceptional glassing job & that I was lucky to have had it done by a pro who knew what he was doing. Many glass jobs are done incorrectly but when done right, they offer a woodie stability & longevity. I got the Monell fasteners for her refastening based on that knowing she will survive my lifetime & the next generation if she's properly cared for.
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Old 04-21-2015, 09:40 AM   #45
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Starside...
Thought I replied a day or so ago but don't see it???

First - nice job on the refurbishment - certainly a great looking boat!
...
I think having thrusters has given me the confidence to use the boat more w/o any doubts and by having the thrusters (to fall back on just in case) has allowed me to practice more w/o using them. I have gotten better w/o them AND like having them in case conditions warrant the assist and/or I encounter unanticipated conditions w/ wind / current.
Like many things - now that I have them I'd hate to give them up... makes life easy and pleasurable...
I assume you have looked at the "bolt on" bow thrusters - no first hand experience but seems like they would be worth a look given your relatively slow speed.
One suggestion I would add is that I have found that in some situations (home port dock) it is more beneficial to add protection on the dock than fenders on the boat - how about a rubber roller for the dock corner you mentioned??
Rubber strips, rollers, fire hose, etc... can help avoid damage from a bump.

You hit it on the nail for me here. I plan on practicing first for a few months but I don't want to not cruise bc I'm still scared of hitting things. The bolt-on thrusters seem like the right fix, if I go that route. For now, I'm going to practice, practice, practice. :-)
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Old 04-21-2015, 02:22 PM   #46
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The bolt-on stern thrusters from companies like Cap Sante seem like well-made products that fit and perform very well.

The "bolt on" bow thrusters I've seen all look like Rube Goldberg, Mickey Mouse sort of affairs that are incredibly vulnerable to damage and are potentially damaging to the boat's hull in the process.
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Old 04-21-2015, 07:53 PM   #47
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That stern thruster is a very good looking design.


http://capsante.com/box%20thrusters.html#

Cap Sante Marine Stern Thrusters | Shallow draft cutaway
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Old 04-21-2015, 08:48 PM   #48
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The stern thruster on my boat is similar to the one from capsante. It has cowls on both ends. I agree with Marin on the external bolt on thrusters. The one I've seen on a boat in my marina did not look very substantial. The housing was made out of aluminum and badly corroded.
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Old 04-21-2015, 09:33 PM   #49
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Always considered the rudder and propeller to be the stern thruster.
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Old 04-21-2015, 11:16 PM   #50
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Quote:
Originally Posted by psneeld View Post
Anyone have any data on how much drag a bow thruster adds to a displacement hull?

Understandably it depends....but anyone add o e and notice a speed per rpm diff?

I never have read of a negative so I am guessing either too low to notice or too low to care.

Low speeds require power bursts to turn many boats of all shapes and sizes.....
We installed a bow thruster last year. I can't tell any performance difference. It does make a big difference in tight quarters handling and my confidence in handling the boat. Which means I enjoy the boat more, and in my book that is what it is all about.
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Old 04-25-2015, 06:36 AM   #51
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Do you know "Jet Thruster"? Maybe an easy and fast solution


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Old 04-25-2015, 08:43 AM   #52
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I have had a bow thruster on a Mainship 34 (82). Boat has too small rudder located too far forward so handling w/o thruster left much to be desired. I currently have a 38ft Present (Tiawan) with a stern thruster. Both singles. I like them both, giving the edge to the stern thruster.

Generally you can put the nose, initially, where you want it without a thruster then you can hold it there with a thruster with forward way on. Thrusters are a gift from God...I love em. The stern, after having both is my preference. I am suspicious of external bow thrusters, looks like susceptible to damage. External stern much less so.

As stated by another poster, stern goes port, bow goes starboard and visa versa with a bow or stern thruster. Either way you will just love your new thruster, upon first use.
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Old 04-25-2015, 11:05 AM   #53
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Thanks Mule!
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Old 04-25-2015, 11:07 AM   #54
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Do you know "Jet Thruster"? Maybe an easy and fast solution


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That Jet Thruster looks interesting. Thanks for the tip.
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