Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-20-2022, 10:31 AM   #21
Guru
 
twistedtree's Avatar
 
City: Vermont
Join Date: Jan 2013
Posts: 10,092
Quote:
Originally Posted by Gdavid View Post
You are far more experienced at specing out boats than I am, but to my knowledge, most jog levers are operating with low amperage/current and the autopilot computer serves as both a solenoid to provide higher amperage that the pump requires, this also will provide the logic to prevent slamming against the end of the ram's travel. There are also hydraulic jog levers that are directly controlling the flow, but this would require a constant pressure pump like a automotive style belt driven ot pto driven pump.


I think you are correct that having an intervening AP is common, and addresses the issue you bring up. TF boats probably use reversing pumps more than continuous pumps with solenoid valves, so your point about switching currents is quite valid and needs to be considered. That said, one of the nice things about simple switching on and off of the pump is the simplicity of it, and not relying on anything other than the pump and switches. As such I think it makes for a great backup, which I think is what the OP was after.
__________________
MVTanglewood.com
twistedtree is online now   Reply With Quote
Old 01-20-2022, 10:32 AM   #22
Guru
 
City: Olympia
Vessel Name: Rendezvous
Vessel Model: Blue water 40
Join Date: Aug 2021
Posts: 1,815
if we're just talking about a "get home" type of system, there are plenty of inexpensive electric linear actuators with built in travel limits. the thing that's the biggest challenge with them is travel speed vs. torque. you get past the voltage drop problem using relays close to the point of use, and a simple joystick at the helm to fire the relays. these actuators are small enough to cover the whole thing with a bellows for protection, or just use quick release pins and a plug set if you want to deploy it.
like these: https://www.progressiveautomations.c...31290949763139

not appropriate for primary steering, but for a back up solution.
Bmarler is offline   Reply With Quote
Old 01-20-2022, 10:40 AM   #23
Guru
 
City: Olympia
Vessel Name: Rendezvous
Vessel Model: Blue water 40
Join Date: Aug 2021
Posts: 1,815
another idea i was working on with my last boat was based on a 12 volt hydraulic power pack. this was a primary steering solution for fly by wire. again, you need relays at the power unit to control it, and has been mentioned, cylinders with cushions can be used instead of physical stops and rudder feedback. an adjustable cross port relief will absorb any sudden shock loads or coming to the end of the cylinder stroke.
i was planning on autopilot integration using the on/off output from an autopilot. never finished it though, sold the boat. still have the new power pack and relief valve in the shop somewhere.
Bmarler is offline   Reply With Quote
Old 01-31-2022, 08:32 AM   #24
Guru
 
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
Just saw an article about steer by wire retrofit this morning:

https://www.powerandmotoryacht.com/....ronic-steering
Gdavid is online now   Reply With Quote
Old 01-31-2022, 08:37 AM   #25
Guru
 
City: Olympia
Vessel Name: Rendezvous
Vessel Model: Blue water 40
Join Date: Aug 2021
Posts: 1,815
Quote:
Originally Posted by Gdavid View Post
Just saw an article about steer by wire retrofit this morning:

https://www.powerandmotoryacht.com/....ronic-steering
the optimus product has been out for a while now, i looked at it but it's still pretty expensive. looks like good stuff though. there's an inboard solution too.
Bmarler is offline   Reply With Quote
Old 01-31-2022, 08:50 AM   #26
Guru
 
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
Quote:
Originally Posted by Bmarler View Post
the optimus product has been out for a while now, i looked at it but it's still pretty expensive. looks like good stuff though. there's an inboard solution too.
I didn't check the age of the article and am not surprised that solutions have been out for a while, I just popped (edit) up somehow as a suggested article and I remembered this thread. I also didn' t bother to check all the oosts.

Ofer could simplify the whole challenge and solve it with a 2"x4" and a roll of duct tape.
Gdavid is online now   Reply With Quote
Old 01-31-2022, 08:54 AM   #27
Guru
 
City: Olympia
Vessel Name: Rendezvous
Vessel Model: Blue water 40
Join Date: Aug 2021
Posts: 1,815
Quote:
Originally Posted by Gdavid View Post
I didn't check the age of the article and am not surprised that solutions have been out for a while, I just pooped up somehow as a suggested article and I remembered this thread. I also didn' t bother to check all the oosts.

Ofer could simplify the whole challenge and solve it with a 2"x4" and a roll of duct tape.
that would indeed be simple.
Bmarler is offline   Reply With Quote
Old 01-31-2022, 10:15 AM   #28
Guru
 
ofer's Avatar
 
City: Homer, Ak
Vessel Name: Unicorn
Vessel Model: 1970 50' DEFEVER OFFSHORE CRUISER Timber
Join Date: Apr 2020
Posts: 526
Quote:
Originally Posted by Gdavid View Post

Ofer could simplify the whole challenge and solve it with a 2"x4" and a roll of duct tape.
Please elaborate
ofer is offline   Reply With Quote
Old 01-31-2022, 10:32 AM   #29
Guru
 
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
Quote:
Originally Posted by ofer View Post
Please elaborate
I was referring to something similar to this example. Of course it would have to be angled up to clear the transom.

My apologies of course, it was not a serious suggestion.
Attached Images
 
Gdavid is online now   Reply With Quote
Old 05-21-2022, 01:38 PM   #30
Guru
 
ofer's Avatar
 
City: Homer, Ak
Vessel Name: Unicorn
Vessel Model: 1970 50' DEFEVER OFFSHORE CRUISER Timber
Join Date: Apr 2020
Posts: 526
I have rigged my steering for my kicker outboard. on the Warn all you need is the main relay box
Attached Thumbnails
20220520_181648.jpg   618zHGYXh9L._SX466_.jpg   20220520_182659.jpg  
Attached Images
 
ofer is offline   Reply With Quote
Old 05-21-2022, 03:59 PM   #31
Guru
 
KnotYet's Avatar
 
City: Los Angeles
Join Date: Feb 2020
Posts: 1,487
Pretty slick; are those Thompson fittings (garden hose) on the reservoir top?
__________________
Science doesn't care what you believe. -Neil deGrasse Tyson
KnotYet is offline   Reply With Quote
Old 05-21-2022, 04:30 PM   #32
Guru
 
ofer's Avatar
 
City: Homer, Ak
Vessel Name: Unicorn
Vessel Model: 1970 50' DEFEVER OFFSHORE CRUISER Timber
Join Date: Apr 2020
Posts: 526
Quote:
Originally Posted by KnotYet View Post
Pretty slick; are those Thompson fittings (garden hose) on the reservoir top?
yes just a cheap converted water strainer for now. took rubber ring from the cap to provide vent.
ofer is offline   Reply With Quote
Old 05-21-2022, 05:18 PM   #33
Guru
 
KnotYet's Avatar
 
City: Los Angeles
Join Date: Feb 2020
Posts: 1,487
Quote:
Originally Posted by ofer View Post
yes just a cheap converted water strainer for now. took rubber ring from the cap to provide vent.
Hopefully you will have no problems but some seal materials don't mix well with
the oil-based steering fluid, ATF, etc. I do like the simplicity of that system.
__________________
Science doesn't care what you believe. -Neil deGrasse Tyson
KnotYet is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 09:52 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012