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 02-12-2021, 10:11   #1
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Self bailers - which one?

I'm looking for a self bailer to drain an outboard well on a catamaran while sailing, with the outboards up, and the well doors closed. I'd like one that was adjustable from closed to fully open that would drain 70lt of water quite quickly (I assume they can do this in less than a minute?). Hopefully a quiet one when cracked open just enough to keep it drained from water that sneaks passed the seals.

Does anyone have experience with these and are they effective?

Can you recommend one?

Thanks.
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Old 02-12-2021, 10:22   #2
Registered User

Join Date: Aug 2010
Posts: 2,334
Re: Self bailers - which one?

What would be the purpose of being able to close a scupper?
Shrew is offline   Reply With Quote
Old 02-12-2021, 11:02   #3
Registered User

Join Date: Mar 2017
Location: Bogue Sound NC
Boat: Cape Dory MKII 1987 Hull #3
Posts: 871
Re: Self bailers - which one?

https://atlanticriggingsupply.com/pr...saAlh8EALw_wcB
__________________
A Sempre Avanti
Mahalo Plenty
Geriatrics Rule
davil is online now   Reply With Quote
Old 02-12-2021, 11:26   #4
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Re: Self bailers - which one?

Quote:
Originally Posted by Shrew View Post
What would be the purpose of being able to close a scupper?
I don't know much about them but I imagined to reduce drag. prevent damage when drying out, reduce noise. They need to close as the doors open.
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Old 02-12-2021, 11:27   #5
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Re: Self bailers - which one?

Quote:
Originally Posted by davil View Post
Thanks for the link,
There's not much information on them, do you think it will do what I want?
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Old 02-12-2021, 14:07   #6
Registered User

Join Date: Mar 2011
Location: Southport CT
Boat: Sabre 402
Posts: 2,011
Re: Self bailers - which one?

Bailers like the one davil posted work in thousands of sailing dinghies worldwide. There are two on my 505 dinghy. Useful when we turtled last outing, though we also have transom openings to speed up the bailing process. 70L of water is quite a bit, and it might take longer than a minute to drain. Is there room to mount two of them?
psk125 is offline   Reply With Quote
Old 02-12-2021, 14:36   #7
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Re: Self bailers - which one?

Quote:
Originally Posted by psk125 View Post
Bailers like the one davil posted work in thousands of sailing dinghies worldwide. There are two on my 505 dinghy. Useful when we turtled last outing, though we also have transom openings to speed up the bailing process. 70L of water is quite a bit, and it might take longer than a minute to drain. Is there room to mount two of them?
There is enough room for 2, it wouldn't really matter if it took 2 minutes, I just picked 1 minute as a guide so I could understand how long it might take.
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Old 02-12-2021, 15:13   #8
rbk
Registered User
 
rbk's Avatar

Join Date: Feb 2016
Location: Canada
Boat: T37
Posts: 2,177
Re: Self bailers - which one?

On dinghies these are generally installed through the bottom of the hull and only drain when sailing and do drain rather fast when moving through the water (sounds like a tub draining with the suction). The one way rubber flaps are prone to damage and if you forget to close when stopped they fill the boat with water. They are also awesome toe stubbers and accidental openers. I can easily see these being left open or leaking and filling the cavity when stopped in a closed out of sight compartment. These are great in dinghies where they are always in the way and treated as a red hot poker when barefoot sailing, not ideal in a closed compartment. There are inflatable self bailers but must be installed above the water line and are prone to failure (simple rubber flap). A small bilge pump may be the safest and best option.
rbk is offline   Reply With Quote
Old 03-12-2021, 20:42   #9
Registered User

Join Date: Mar 2009
Location: Southern Chesapeake Bay
Boat: Norseman 430, Jabberwock
Posts: 1,175
Re: Self bailers - which one?

Can you post a picture of what your "well" looks like? And the doors. And the seals.
ggray is online now   Reply With Quote
Old 04-12-2021, 15:25   #10
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Re: Self bailers - which one?

Quote:
Originally Posted by ggray View Post
Can you post a picture of what your "well" looks like? And the doors. And the seals.
It's a fresh design and sealing it is my biggest issue, it has to seal reasonably well around the outside and where the 2 doors meet in the middle, I'd like to be able to close it once emptied, I'm ok with opening it from time to time but not leave it on.

I don't have a finished design yet ��. I work in Autodesk Inventor 3D and I needed to know what bailer to use and if it will work/fit before drawing up the design. I hope I'm using the Super Max size bailer. I am still a bit worried how well they will work 400mm below the waterline... Will they have enough suck to pull the last of the water out ?

Backup plan is to pump the water out but I like the simplicity of the bailer.
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Old 04-12-2021, 15:55   #11
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Re: Self bailers - which one?

This is the only photo I have, that's the tip of the leg of the outboard you can just see.
Attached Thumbnails
Click image for larger version

Name:	IMG_20211202_153142.jpg
Views:	21
Size:	466.2 KB
ID:	249339  
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Old 04-12-2021, 16:09   #12
Registered User

Join Date: Mar 2009
Location: Southern Chesapeake Bay
Boat: Norseman 430, Jabberwock
Posts: 1,175
Re: Self bailers - which one?

OK, I'm getting a picture here. (edit: I wrote this before I saw your picture in the following post) Since this is on a catamaran, not what I expected.

It sounds like you are talking about a well through the bottom of the hull(s), not unusual on a monohull, but outboards on all cats I've seen hang down from the bridgedeck.

So the bottom of this well is 400mm (16 inches?) below the waterline? I doubt any dinghy self bailer is designed for that kind of pressure. I was going to suggest a venturi self bailer, but that deep, I expect it would just leak water in. Badly.

https://fostersshipchandlery.co.nz/p...venturi-bailer

If you can seal the doors, a pump may be the only solution. Or even if you can't!
ggray is online now   Reply With Quote
Old 04-12-2021, 17:10   #13
Registered User

Join Date: Mar 2009
Location: Southern Chesapeake Bay
Boat: Norseman 430, Jabberwock
Posts: 1,175
Re: Self bailers - which one?

Now that I see your picture, I'm curious about what you plan to do.

Is the outboard fully raised in the picture? I hope not because there isn't room for "inward" opening doors to do so. And I wouldn't want to think about the drag and other issues of "outward" opening doors.

How do other boats of this model rig doors...or fairings"? Or do they not, and you think it would be good to block off the hole at the bottom...which it would, but not easily I'd think.
ggray is online now   Reply With Quote
Old 05-12-2021, 02:51   #14
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Re: Self bailers - which one?

Originally it had an aluminium plate screwed/hinged to the outboard skeg, so when you raise the outboard the formed plate overlapped the opening. (Outboard raised by winch and the line held in a locking cam cleat)

When the outboard is in use the plate sits deep in the water and kept true to the waterflow by being hinged forward of centre. Not so good in reverse.

Less than ideal.
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Old 05-12-2021, 04:44   #15
Registered User
 
Dave_S's Avatar

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,783
Re: Self bailers - which one?

The outboard can go quite a bit higher (maybe another 300mm but any higher than it is and it will then come up above the top hatch level and poke out the top, I'd prefer the hatch closed when sailing. As you see it the hatch is closed with about 30mm clearance.

Because I enjoy making my life hard. I would want the raising and lowering of the outboard to automatically open and close the hatches/doors. So in a hurry I can just drop it.

My ideal result would be a single door that slides down on guides and cams and over centres into position to lock down but I think to keep a no interference door pathway without the middle of the doors arc connecting with the skeg will require 2 doors. 2 doors are more than twice as hard.
__________________
Regards
Dave
Dave_S is offline   Reply With Quote
Reply

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
Self Bailers. How do I choose a size ? Dave_S General Sailing Forum 5 09-09-2020 07:49
Feathering Propeller, which one is this one? thaisail Propellers & Drive Systems 4 22-12-2017 18:21
SSB radios - which one to get as a cheap starter one? alctel Marine Electronics 56 20-11-2015 17:38
A tablet to replace it ALL: how, which one, which apps? decca Navigation 187 08-05-2013 21:19
Hand GPS Which one ist the right one? Caroline Marine Electronics 10 27-04-2005 23:09

Advertise Here


All times are GMT -7. The time now is 20:13.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.