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Old 27 April 2012, 04:12   #11
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IF there is a void, then it WON'T work. Any bubble free adhesive medium can be used to stick it to the hull. The transom transducer is similar in operation to a through-hull - it's just the mounting that differs. If you have a paddle wheel on the transducer, you'll obviously loose the speed reading and the temp will be the temp of your bilge well!

You can TEST the set up without bonding it in - so long as the water is over the transducer and it's facing down, it should work.
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Old 27 April 2012, 08:42   #12
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Will K, thanks for the idea. Of course it would be very simple to slacken the bolts, launch the baot and try moving the transducer different directions to try and improve it then failing that try with the transducer in the pool of water always in the well at the back of my boat.

Surely testing in the pool of water the echo woudl just bounce back off the top of the base of the well and effectively tell me the water depth is only a few mm deep, or am I being stupid?

Are tornado really stupid or is there some clever reason why the elephants trunk is located way about the base of the well. There is always 50kg or so of water there, is that deliberate?!
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Old 27 April 2012, 11:55   #13
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Originally Posted by diver 1 View Post
Surely testing in the pool of water the echo woudl just bounce back off the top of the base of the well and effectively tell me the water depth is only a few mm deep, or am I being stupid?
The signal goes through the layer of water in your bilge, through the GRP, through the water and reflects off the actual bottom to return. The assuming the hull is not cored with something else (balsa, plywood, metal, or air voids).
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Old 27 April 2012, 12:07   #14
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it won't work through a void.
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and effectively tell me the water depth is only a few mm
no,simply put it works fine
Doesnt need to be a special in hull transducer-in practise a skimmer will also work fine. Ordinary clear silicon is what we use and works fine with the advantage it can be removed again without a drama. But unless you can find that single skinned bit of hull you're perhaps stuffed on this line of attack
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Old 27 April 2012, 12:26   #15
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A wider photo of the whole transom... shows the full width
When underway does the boat sit in the water at that angle? Seems like underway the bow might be higher and the transducer will be shooting "forward" too much. Its hard to tell the angle for the back. It certainly seems low enough.
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