Ah, OK. ?I misunderstood, even though your post was clear. ? Insufficient caffeination on my part. ?Apologies. ?You ARE planning on cutting a biggish hole and want a flat spot on the outside of the hull for that. ??
My question to you is, is it worth the effort for a paddlewheel gain? ? All that gets you over what you¡¯ve already got is speed thru water via an old-school technology, prone to fouling, when you could get the probably more useful (at least for navigation purposes) speed over ground thru a cheap handheld GPS, with no hole in the bottom. ? Maybe I¡¯m missing something. ? Thanks¡ª-Warren Stein
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On Jul 9, 2019, at 9:47 AM, Jeremy Shaw
jeremy@... [T27Owners] <
T27Owners@...> wrote:
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My impression is that the face of the transducer is still in direct contact with the water. It's just that the boat builder was nice and created a nice flat area for you to mount the transducer. I would presume (because I can't find information) that the boat is built with the surface there, but no hole -- and you drill a hole to fit your particular transducer.
A similar concept would be glassing the fairing block into the hull. (See attached.) My particular transducer does not have an off-the-shelf fairing block available, but I could fabricate something and then glass it into place.
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?That ¡®pocket¡¯ concept is very interesting. ? Would that be hollow, i.e. a fairing applied to the hull with an air space between the hull and the outer skin of the fairing?? Or does that hollow area get filled with mineral oil or something else?? Or is the fairing solid fiberglass?? The reason I ask is, on the early T27s, at least, the hull thickness seems awfully thick to begin with, like close to an inch! ? ?So if one then added more thickness in the form of a solid glass fairing, are we getting to the point of too much fiberglass to shoot thru?? Thanks!? Warren Stein
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I temporarily mounted my DST800 triducer on the port side under the icebox using a blob of wax from a toilet bowl wax o-ring. It's kind of like sticky playdoh. I've been using it that way for the last 6 months and it works fine.
One advantage of mounting inside the hull is that it is easier to get the sensor pointing straight down.
I am now in the process of trying to properly mount it.?While the depth portion works fine shooting through the hull, the paddlewheel that measures speed through water doesn't work so well embedded in a glob of wax and mounted inside the boat.
?I've removed the old transducer that was installed on the starboard side in the locker under the seaberth, and am going to install the new sensor in its place.
The deadrise is pretty close to the edge of what the sensor will support, so I am thinking that I want to add a fairing block or something to level it out -- I am still researching options. One tempting option is to layer on some fiberglass to create a 'pocket'. See attached.
- jeremy
