I was never happy with original location of the transducers, e.g.
on a hard stb reach the transducer would come out of the water
((Have any of you 36 owners found a good location??
TIA
Corky
corkreed@gulftel.com
bestlocation of thruhulls on CD 36.
Moderator: Jim Walsh
-
Corky Reed
bestlocation of thruhulls on CD 36.
I am replacing the depth meter and the knot log on my CD36 hull #32.
I was never happy with original location of the transducers, e.g.
on a hard stb reach the transducer would come out of the water((
Have any of you 36 owners found a good location??
TIA
Corky
corkreed@gulftel.com
I was never happy with original location of the transducers, e.g.
on a hard stb reach the transducer would come out of the water
((Have any of you 36 owners found a good location??
TIA
Corky
corkreed@gulftel.com
-
Dana Arenius
Re: bestlocation of thruhulls on CD 36.
There are two locations methods for a depth sounder that I have seen work when the boat sits between a substantial bow and stern wave and has some degree of heel.
On my first boat, the manufacturer cut a 4" horizontal cut and then a verical cut down into the bow edge of the boat. This location was about 1-1/2' below the waterline at the bow. This formed a cutout wedge area. They glassed along the horizontal and vertical cuts to form a vertical and horizontal flat surface. The depth sounder transducer was mounted vertically thru the horizontal surface, thus it faced toward the bottom. Being cut into the bow edge, this single transducer always looked at the bottom and was independent of heel. Since it was at the bow, it was always submerged and did not see any buddles, can not see the keel, etc. I thought this was very orginal, a little more expensive, but worked very well with a single transducer.
On my present CD26, two Datamarine flush mounted transducers were installed on each side in the traditional midship locations. A Datamarine "level" switch determines which transducer is used depending on heel direction. One transducer is the default transducer in the true vertical position. The general problem of the keel getting in the way or the transducer becoming exposed out of the water (especially between the bow/stern wave action and heeling) is no longer a problem.
I have never seen a "flicker" in the readings during the transfer between the transducers in the 13 seasons I have had the system.
The Knotmeter problem is similiar to the depth sounder when it comes to keeping it submerged during the bow/stern wave action and heeling condition. For this reason, many manufacturers place the transducer forward (about 1/3 aft of the bow) and at least a 1-1/2 ft below the waterline. This is an ideal location since laminar flow generally does not exist, bubbles have not formed, the transducer will stay in the water (i.e in the bow wave) even if the boat is heeled, and there are no eddy currents like there are further aft.
Hope it is of some help.
Dana
darenius@aol.com
On my first boat, the manufacturer cut a 4" horizontal cut and then a verical cut down into the bow edge of the boat. This location was about 1-1/2' below the waterline at the bow. This formed a cutout wedge area. They glassed along the horizontal and vertical cuts to form a vertical and horizontal flat surface. The depth sounder transducer was mounted vertically thru the horizontal surface, thus it faced toward the bottom. Being cut into the bow edge, this single transducer always looked at the bottom and was independent of heel. Since it was at the bow, it was always submerged and did not see any buddles, can not see the keel, etc. I thought this was very orginal, a little more expensive, but worked very well with a single transducer.
On my present CD26, two Datamarine flush mounted transducers were installed on each side in the traditional midship locations. A Datamarine "level" switch determines which transducer is used depending on heel direction. One transducer is the default transducer in the true vertical position. The general problem of the keel getting in the way or the transducer becoming exposed out of the water (especially between the bow/stern wave action and heeling) is no longer a problem.
I have never seen a "flicker" in the readings during the transfer between the transducers in the 13 seasons I have had the system.
The Knotmeter problem is similiar to the depth sounder when it comes to keeping it submerged during the bow/stern wave action and heeling condition. For this reason, many manufacturers place the transducer forward (about 1/3 aft of the bow) and at least a 1-1/2 ft below the waterline. This is an ideal location since laminar flow generally does not exist, bubbles have not formed, the transducer will stay in the water (i.e in the bow wave) even if the boat is heeled, and there are no eddy currents like there are further aft.
Hope it is of some help.
Dana
darenius@aol.com
-
Chuck Carmichael
Re: bestlocation of thruhulls on CD 36.
I have hull #67, a 1982 CD36. I installed the depth transducer, a Data Marine Offshore hockey puck type under the V-berth seat slightly off center to avoid the anchor well drain hose. I've never had a problem with the transducer out of the water. Although I was able to recess the puck type transducer it still required a quite a bit of fairing. The knot meter transducer was installed under the shower sump on the port side. It's about a foot away from the keel. Here again, it's deep enough to stay in the water. Both locations work well and are easy to inspect. hope this helps.
CRCGALATEA@AOL.COM
Dana Arenius wrote: There are two locations methods for a depth sounder that I have seen work when the boat sits between a substantial bow and stern wave and has some degree of heel.
On my first boat, the manufacturer cut a 4" horizontal cut and then a verical cut down into the bow edge of the boat. This location was about 1-1/2' below the waterline at the bow. This formed a cutout wedge area. They glassed along the horizontal and vertical cut
CRCGALATEA@AOL.COM