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Post by carterj22 on Jan 28, 2015 21:39:31 GMT
Hi, we are looking to get a bow thruster fitted to our SO 39i. My biggest concern is sail performance. Our boat really sails lovely, really well balanced, will fitting a bow thruster impact much on the sail performance of the boat. Does anyone have a SO39i with a bow thruster, if so how does she sail.
Thanks very much for any feedback
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Post by MalcolmP on Jan 28, 2015 22:32:00 GMT
We have the factory fitted Maxpower and as it has been fitted from new cannot comment on before and after, but in my mind the boat still sails well.
The factory one does not fair the two apertures - I understand that if a slight profile is built up it helps with laminar flow. Why not fit a retractable type? more complex and expensive but there should be room beneath the forward berth.
Of course in addition you will need a "heavy" battery and also heavy gauge wiring, so the additional weight in the forepeak is also a negative for performance. Guess there will always be a trade off.
I do like the thruster, but after 7 seasons we have learnt to manoever the boat most times without its assistance, especially in the last 2 years as the battery is pretty shot, but we will replace the battery for the coming season as it is good to have in tight circumstances when the wind is really gusty
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Post by electricmonk on Jan 29, 2015 17:36:50 GMT
retro fitted a thruster to my 43, no difference in sailing performance.
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Post by vasko on Jan 29, 2015 17:55:04 GMT
same here , fitted a maxpower 35 on my liberty 34 no effect on sailing performance
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Post by carterj22 on Jan 29, 2015 20:54:50 GMT
Thanks for the feedback, really helpful.
Thanks very much
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Post by toniocask on Jan 29, 2015 21:16:34 GMT
Retro fitted on a S.O. 42i max power ct 80, very good performance and no lower speed under sail.
ciao
Antonio
S.Y. Alchimia
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Post by rxc on Jan 30, 2015 4:44:42 GMT
I haven't noticed any difference in sailing or motoring performance. I would agree with the comment about the fairing of the tunnel where it exits the hull - it needs to be done by someone who is very knowledgeable and skillful about this. Definitely NOT for DIY or the backyard fiberglass guy.
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Post by nornaj on Jan 30, 2015 5:05:31 GMT
Fitted a Lewmar unit to our 39i in 2013. Fairing was done professionally. No noticeable impact on speed.
best. Expensive, but worth it.
NornaJ
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Post by toniocask on Jan 30, 2015 14:03:13 GMT
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Post by toniocask on Jan 30, 2015 14:05:28 GMT
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Post by toniocask on Jan 30, 2015 14:07:26 GMT
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Post by toniocask on Jan 30, 2015 14:38:43 GMT
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Post by toniocask on Jan 30, 2015 14:40:28 GMT
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Post by toniocask on Jan 30, 2015 14:42:41 GMT
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Post by toniocask on Jan 30, 2015 14:44:42 GMT
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Post by toniocask on Jan 30, 2015 15:28:28 GMT
I have more pictures, but here the max size is 1 mb, and mostly are bigger.
I've installed a Max power CT 80 with 185 mm diameter, it was the same jeanneau installed originally,
the battery I chosen is a Optima yellow top 75 amp with 975 cca, it works very good, I'm happy.
hope can help you to better understand what is the work to do..
Ciao
Antonio
S.Y. Alchimia
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Post by MalcolmP on Jan 30, 2015 16:32:44 GMT
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