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Has anyone tried moving the speedo to centerline

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Johan Hackman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Johan Hackman Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2017 at 10:34
I can confirm that you can use SOG as Boat Speed on B&G Triton displays. I don't know whether this will be used to calculate True Wind, but it seems logical.

I will not tick that box because of what I believe in and what I have written about in this thread.

Johan

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Post Options Post Options   Thanks (0) Thanks(0)   Quote StavrosNZ Quote  Post ReplyReply Direct Link To This Post Posted: 12 July 2017 at 22:12
I leave the paddle wheel in the hull as it has sea temp sensor built in and it still provides True wind data but use SOG on instruments...............for cruising, trouble free.
Stephen
2010 H400, Auckland, New Zealand
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jracoffman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jracoffman Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 19:27
Well, this has certainly been an interesting thread. Given I am doing a lot of distance racing, and in an area where there is typically a fair amount of current, I did move forward with moving the speedo to centerline. I was able to find a 'shorty' transducer that just barely fits under the floorboard in the forward cabin. I may have to get the router out to give a hair more clearance for the floorboard. Now I will have accurate speed readings through the water on both tacks (it could vary up to 1kt), which will also translate to more accurate wind readings.

Sadly, when I pulled up that floorboard, we found evidence of the hull flexing, and the tabbing from the hull to the grid being damanaged. I will start another thread, but curious if anyone else has experienced this. I am told this could be upwards of 15 hours of work. Ugh.



James C
Gemini, Hanse 375 #644
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jracoffman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jracoffman Quote  Post ReplyReply Direct Link To This Post Posted: 16 July 2017 at 19:42
James C
Gemini, Hanse 375 #644
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Johan Hackman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Johan Hackman Quote  Post ReplyReply Direct Link To This Post Posted: 17 July 2017 at 17:08
James,

Is the speed sensor on your boat on the port side? On mine it is on the starboard.

I am curious to know what speed sensor you found that doesn't stick up so much. Do you have a link to the product site?

I am also very curious how your new solution works. Please keep us posted.

As for the cracks, I am sad to see that this has happened to you. I think my boat looks similar with the outer mould (the hull) and the inner mould (the frame and the interior) are joined together in this area. I think this would further complicate installing a speed sensor since you will have to drill through two layers of plastic.

I have not experienced any cracks in this are and can sadly be of no help here.

Johan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jracoffman Quote  Post ReplyReply Direct Link To This Post Posted: 17 July 2017 at 18:43


Here are pics. It's the Airmax ST300 Short Speed Transducer.. It just barely fits under the floorboard in the forward cabin, and is now perfectly at centerline. We will use a router on the underside of the floorboard just where the senor is to give a bit more clearance.

The person who did the electronics install said Hanse couldn't have picked much worse of a spot to put the speedo with the exception have having it further aft..

Will keep folks updated on how the rest of the electronics installation goes and improved accuracy. Will start a new thread on the hull flexing. No word back from Hanse on the recommended repair or if any might be covered under warranty.
James C
Gemini, Hanse 375 #644
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jracoffman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jracoffman Quote  Post ReplyReply Direct Link To This Post Posted: 17 July 2017 at 18:45
And to answer your question, the speed sensor was originally on port. Now we have a separate depth and temp sensor where the old unit was that did depth, speed and temp. Both have flush mounts too, so nice and smooth on the bottom of the hull.
James C
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factorygirl View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote factorygirl Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2017 at 23:24
Hi! I have moved my Simrad/Airmax tridata transducer to the centerline, just behind the watertank (Hanse 375, 2010). It was quite easy and it works perfect. I did it because the depthsounder didn t work and someone in this forum said that it could be because the transducer were too close to the T-keel-bulb.
Runar, Factory Girl
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jracoffman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jracoffman Quote  Post ReplyReply Direct Link To This Post Posted: 03 August 2017 at 16:45
Sounds like we have sisterships. While I didn't have the depth issue, having the speedo under the floorboard in the forward cabin, exactly centerline and far enough forward of the keel makes a huge difference.   For someone who sails in a lot of current, it's great to have an accurate speed data. Using the new shorty speedo had just enough clearance that I didn't even have to raise or alter the floorboard. Had about a quarter inch of clearance.
James C
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factorygirl View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote factorygirl Quote  Post ReplyReply Direct Link To This Post Posted: 03 August 2017 at 21:49
Originally posted by jracoffman jracoffman wrote:

Sounds like we have sisterships. While I didn't have the depth issue, having the speedo under the floorboard in the forward cabin, exactly centerline and far enough forward of the keel makes a huge difference.   For someone who sails in a lot of current, it's great to have an accurate speed data. Using the new shorty speedo had just enough clearance that I didn't even have to raise or alter the floorboard. Had about a quarter inch of clearance.
A little cheaper the way i did it, using the same transducer. Did only buy one new surronding tube. Left the old with a plug in. My Factory Girl is #704. Bought her in 2014. Wonderful boat with some annoying issues, the one left now is mainly the wet cocpit-lockers (including the one for the autopilot) on the cocpit floor. Difficult to make it better.
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