Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 29-10-2022, 21:12   #31
Registered User

Join Date: Dec 2012
Boat: Pearson 386
Posts: 160
Re: Depth/speed sensor options.

MerryDolphin Good to know the inside the hull transducers work well on solid glass boats. My Pearson 386 has about 3/4" of solid glass where the original thru-hull is located about 18" forward of the keel. In all my years of sailing I've never seen these leak. Of course It is important that the inner hull be flat and as close to perpendicular as possible to the plane of the seat on the outer hull. On boats I've installed the thru-hull I dril the hoe ~3/16" larger than the stem major diameter and then coat the exposed glasse in two separate mixing step using resin and micro-ballons letting each one cure to minmze clearance before installing the thru-hull fitting. I clean the inner and outer seat zone with laquer thinner and use polysulfide type sealant for the final install. I also haul the boat annually and check that thru-fitting tube and O-ring land is in good clean condition. Then apply a light coat of Dow Corning silicone grease to the O-ring.
OneBoatman is offline   Reply With Quote
Old 30-10-2022, 05:21   #32
Registered User

Join Date: Mar 2014
Location: Belgium
Posts: 754
Re: Depth/speed sensor options.

Quote:
Originally Posted by OneBoatman View Post
On boats I've installed the thru-hull I dril the hoe ~3/16" larger than the stem major diameter and then coat the exposed glasse in two separate mixing step using resin and micro-ballons letting each one cure to minmze clearance before installing the thru-hull fitting.
Okay, I don't get this. Why oversize the hole then fill it back in? You could either drill the hole proper size and tight, or slightly oversized but coat the entire stem with bedding compound/sealant as you insert the transducer, thus having three surfaces for water tightness (exterior sealant/O-ring, steam sealant, interior sealant/O-ring).
mako is offline   Reply With Quote
Old 30-10-2022, 05:47   #33
cruiser

Join Date: Mar 2022
Location: Ontario Canada
Boat: Jeanneau SO 389
Posts: 1,971
Re: Depth/speed sensor options.

Great Lakes so anti-algae wax seems to survive a season.
I like forward looking fish finding stuff. We are, have been wreck divers for some time. Our first GPS way points were all shipwrecks. When I saw a map of one of the wrecks I visit in colour 3D I was in love love love. Folks use their iPads but they dont like the sun. Ours is at the nav station beside another plotter running entertainment via a wisa broadcast system.
We do have some oddball homemade electronics my grandson and I made. Raspberry 2 cameras a servo shield 8 relays 2 stepper motors and I 3D printed a water proof container for it. We made a dissolved oxygen sensor on a breadboard. It was really interesting.
Kudos to you if you can make all that stuff work and show up on the screen.
We have name brand no issues at all. We have not added radar but its a consideration.
Rumrace is offline   Reply With Quote
Old 30-10-2022, 06:20   #34
Registered User

Join Date: Dec 2012
Boat: Pearson 386
Posts: 160
Re: Depth/speed sensor options.

Mako - Applying polyester, vinyl ester, or epoxy systems to re-seal the laminate where you may drill a large hole in the hull is pretty common when installing thru-hull fittings in 4 seasons climates. Many folks also do this when fastening their deck fittings such as clutches, windlasses and other areas they tend to. All done before any bedding compound is applied. I believe it is particularly important for cored laminates. Moisture can accumulate to the low points and freezing any laminate with high moisture content is a recipe to weaken the hull locally. I guess you could argue that osmosis happens eventually anyway and it may not effect you if don't you plan on keeping the boat very long. And then maybe its just superstition.
OneBoatman is offline   Reply With Quote
Old 30-10-2022, 10:07   #35
Registered User

Join Date: Mar 2014
Location: Belgium
Posts: 754
Re: Depth/speed sensor options.

Okay that makes perfect sense with a cored hull or deck. Maybe I missed that part of your original post. How about with a solid fiberglass hull - would there be an advantage to still employing that practice?
mako is offline   Reply With Quote
Old 05-11-2022, 05:45   #36
Registered User

Join Date: Mar 2011
Location: Puerto Escondido/Loreto, Mexico
Boat: Ocean Alexander tri cabin 52'
Posts: 243
Re: Depth/speed sensor options.

I recommend a in hull transducer connected to a depth and chart plotter combo to start. Next time the boat is hauled install a robust transducer for other bells and whistles, new transducers give you water speed and temp without a paddle wheel.
MVDarlin is offline   Reply With Quote
Old 05-11-2022, 21:34   #37
Registered User

Join Date: Dec 2012
Boat: Pearson 386
Posts: 160
Re: Depth/speed sensor options.

MVDarlin could you tell us which transducers give you speed through the water without a paddlewheel. The transducers I am familiar without paddlewheels that interface with chartplotters aren't able to tell you anything about what the water is doing and only give you speed over the "ground" or distance traveled over time as calculated by the GPS function.
OneBoatman is offline   Reply With Quote
Old 06-11-2022, 00:45   #38
Registered User

Join Date: Aug 2013
Location: Boat in EC, Body in AU.
Boat: Westerly Sealord
Posts: 7,865
Re: Depth/speed sensor options.

I've never had my Airmar paddle wheel suffer from fouling when sailing - only when sitting in a marina for an extended period.... and that can be fixed with a quick scrub with a toothbrush - not mine - hers

And it is always removed when getting lifted out.... pretty dumb not to do that.
__________________
A little bit about Chile can be found here https://www.docdroid.net/bO63FbL/202...anchorages-pdf
El Pinguino is offline   Reply With Quote
Old 06-11-2022, 02:02   #39
Registered User

Join Date: May 2014
Boat: Shuttleworth Advantage
Posts: 1,776
Images: 2
Re: Depth/speed sensor options.

Quote:
Originally Posted by OneBoatman View Post
MVDarlin could you tell us which transducers give you speed through the water without a paddlewheel. The transducers I am familiar without paddlewheels that interface with chartplotters aren't able to tell you anything about what the water is doing and only give you speed over the "ground" or distance traveled over time as calculated by the GPS function.

https://www.nasamarine.com/product/electromagnetic-log/
Tupaia is offline   Reply With Quote
Reply

Tags
depth, sensor

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing B&G Depth/Speed Sensor with New Triton DST deluxe68 Marine Electronics 16 23-05-2022 15:28
[SOLD] Airmar NMEA 200 depth, temp, speed sensor tanglewood General Classifieds (no boats) 0 10-12-2016 22:05
Mounting B&G Speed Depth Temp Sensor. Red Horse Marine Electronics 4 10-08-2014 19:04
Speed Log Upgrade to Speed / Temp / Depth CHM Marine Electronics 0 12-01-2012 12:09
Navman depth & speed transducers, wind sensor, NIB fastfr8r Classifieds Archive 5 22-09-2008 15:12

Advertise Here


All times are GMT -7. The time now is 14:48.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.