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Speed/Log Transducer

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George Isted View Drop Down
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Post Options Post Options   Quote George Isted Quote  Post ReplyReply Direct Link To This Post Topic: Speed/Log Transducer
    Posted: 28 Apr 2015 at 3:50pm
I, like many, have a single log transducer that is located under the floor of the heads compartment on the port side of the hull.   This gives a faster reading on one tack than the other making the data unreliable for working out polars and general performance monitoring.

What have others done to fix this?

I think there is a way to have two transducers (one each side) such that is only reads the correct one - or perhaps it takes an average?

Alternatively there appears to be a combined speed and depth transducer that I could use to replace the existing depth transducer on the centreline of the boat.

Can anyone give advice as there is nothing useful about this online.

I walked past the very tricked-up Contessa 26 "Miao" at the weekend and I note that she has a Log transducer on each side of the hull.

Thanks
George Isted
www.solentboatbutler.co.uk
Contessa 32 "Concerto"
Co32 Class Measurer and ex Class Captain.
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Richard Ritchie View Drop Down
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Post Options Post Options   Quote Richard Ritchie Quote  Post ReplyReply Direct Link To This Post Posted: 28 Apr 2015 at 4:13pm
I have the same problem: Raymarine ST60 definitely reads faster on one tack, by about 1 knot when beating...
Sadly no solution proposed.
Richard Ritchie
Badger of Baltimore
IRL 120
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George Isted View Drop Down
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Post Options Post Options   Quote George Isted Quote  Post ReplyReply Direct Link To This Post Posted: 28 Apr 2015 at 4:19pm
Raymarine support have just emailed me back (surprisingly quickly) suggesting that I can fit a second transducer and a second wireless hull transmitter and it will work out which hull transmitter to use based on the wind data - I guess is works out what the leeward (deeper) transducer is and uses that.

That sounds pretty clever, if expensive, fix to this.

BOAT - Break Out Another Thousand
George Isted
www.solentboatbutler.co.uk
Contessa 32 "Concerto"
Co32 Class Measurer and ex Class Captain.
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George Isted View Drop Down
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Post Options Post Options   Quote George Isted Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2015 at 4:01pm
Just to follow up, following a suggestion from Kit Rogers, a discussion with Raymarine and check with a dealer I have just ordered a T910 Depth/Speed/Temp transducer that will replace the existing Depth/Temp transducer that is in the normal centreline position in front of the keel. This "should" help significantly with the off-centre log issue.

The skin fitting for the old and new transducer is the same so it "should" just be a case of swapping them over.

The downside is I don't yet know what the effect of having the Log on the leading edge of the hull will be.
George Isted
www.solentboatbutler.co.uk
Contessa 32 "Concerto"
Co32 Class Measurer and ex Class Captain.
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Richard Ritchie View Drop Down
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Post Options Post Options   Quote Richard Ritchie Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2015 at 4:57pm
Ah..  My depth sensor is under bunk cushion just in front of galley, so not a solution for me!
I hope it works for you.
Richard Ritchie
Badger of Baltimore
IRL 120
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Post Options Post Options   Quote Richard Ritchie Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jun 2015 at 2:13pm
Speaking of Polars: does anyone have an official polar diagram for the Contessa 32??
Richard Ritchie
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IRL 120
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George Isted View Drop Down
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Post Options Post Options   Quote George Isted Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jun 2015 at 2:38pm
I'll send you what I have Richard.
George Isted
www.solentboatbutler.co.uk
Contessa 32 "Concerto"
Co32 Class Measurer and ex Class Captain.
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