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Jet thruster

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silvest View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silvest Quote  Post ReplyReply Direct Link To This Post Topic: Jet thruster
    Posted: 02 November 2011 at 19:10

 Have any other 370 owner fitted a jet thruster I have contacted
Holland Marine Parts who manufacture a jet thruster and have sent me
details the unit they say would do is JT-50 Single andrequires a lot less work than a bow thruster, I have to check to see if it is possible to fit.
It only requires 3 holes one for water in and two for the jet thrust out and the price is about €3500.
The Email of Holland Marine Parts is info@hollandmarineparts.nl
silvest
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kweetje View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kweetje Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2011 at 07:40
Hello,

this means: 2 extra batteries, creating a 24 Volt system for this truster ?
What is security if one of the hoses gets loose due to the high pressure on the system ? And why is the inlet taken so far on the back of the ship ?
First 4000 miles, no substantial problems
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silvest View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silvest Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2011 at 09:28

  Hi
The system is 12 volt no extra batteries required and the hoses
are to lloyd!s register, and I believe the intake does not to be
right aft it is whereyou can fit it.

I believe it is possible that any through hull fitting can sink the boat if
not maintained ( like the hanse that sank due to the auto helm not fitted correctly)

I am only looking at this system check there web site they have fitted
this unit in a 39ft beneteau.


silvest
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kweetje View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kweetje Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2011 at 15:25
Hi,
i calculated the kgf, came out with result that the 50 is to small and the 70 is apropriate. The 70 can only be delivered as a 24 Volt system...
First 4000 miles, no substantial problems
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kweetje View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kweetje Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2011 at 15:31
the 50 is also only 24V i believe ?
First 4000 miles, no substantial problems
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silvest View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silvest Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2011 at 18:01
 Hi
 On the price list that they sent me the Jt-50 is 12V/ and 24V Item 1 of there price list.

They have said that the JT-50 would be Ok for the Hanse 370 but I have not calcalated it , also I have not looked into if it is possible to fit it yet I was hoping that some one has fitted a unit like this.

They have Emailed me and have said that any help I require contact them
they said that they have not heard of this unit being fitted to any Hanse.
silvest
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gertha View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gertha Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2011 at 19:13
A quick look at the info for the system appears to sugest 24 volt; either way 12 or 24 a beefy battery bank is needed as there are some large amounts of amps required.
For my own info what is the price difference between the jet system and a dropdown bow thruster, by way of capitol cost; my feeling is there will not be alot of difference in cost fitting, one big hole reinforced or three holes.
I would not like three holes of the size required as the water flow on the bow will be compromised; but I am a bit sail and sailing for speed, so a personal point of view.
Simon
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Ian Robinson View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Robinson Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2011 at 16:51
Hello Silvest,
 
It will be interesting to hear how it works in practice, if you go ahead.  A friend of mine seriously considered fitting a jet-thruster to his Fisher 37, but in the end decided the performance was sufficiently uncertain to take the risk and he fitted a standard propeller unit instead.
 
I had a Vetus 60kgf fitted to my 370 this year and it has been very effective.  I haven't raced much this year, but so far I cannot detect any significant loss of performance.  I paid £4250 fully fitted with the extra battery.
 
Regards
 
Ian
 
 
Ostara a 370#88
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silvest View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silvest Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2011 at 18:55
Hi Ian
I would have liked to hear from some one that had fitted a jet- thruster before
I fitted one  I think it is going to be impossible to accomadate the unit into the
boat, and the price that you quoted for the bow thruster is very good and I think
the jet thruster would work out about the same, I do race and I would be concerned
about the drag with a bow thruster and my Grandson said he would not sail with
me if I fitted a bow thrusterLOL
silvest
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MarcoC View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarcoC Quote  Post ReplyReply Direct Link To This Post Posted: 15 November 2011 at 13:08
I looked at a similar solution couple of years ago and thought it would be nice regardign to the sound and the small holes. I also considerd to have 5 holes so I could stera the boat sidewards in harbours etc. But when i heard that it was only possible to use the jet max 4 minutes before it was overheated I skipped the idea. Not that I think you need 4 minutes in a row to use a thruster but I did not want to have anything that risked to get overheated.
"Älva"

Hanse 370#671

Stockholm, Sweden

www.wesailhanse.se big wheel, deep draught iron keel, 3 cabins,Yanmar 3JH4E, Sparcraft rig.
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