SailNet Community - Reply to Topic

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Increasing flotation
 Not a Member? 


Thread: Increasing flotation Reply to Thread
Title:
  

By choosing to post the reply below you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
03-31-2013 12:31 PM
msmith10
Re: Increasing flotation

Quote:
Originally Posted by Siamese View Post
Try adding some helium, cuz foam ain't gonna do it.

If you think about it, though, there's not much point in worrying too much about how she rides in the water. Because of the changing lake levels in Lake Michigan, where I keep my boat, just about every year I have to repaint the boot stripe on my boat to account for higher or lower water. Still, I never seem to get it just right.
There's your answer. You need to lower the water in the South end of the lake
03-31-2013 11:31 AM
Irunbird
Re: Increasing flotation

Quote:
Originally Posted by Siamese View Post
Try adding some helium, cuz foam ain't gonna do it.

If you think about it, though, there's not much point in worrying too much about how she rides in the water. Because of the changing lake levels in Lake Michigan, where I keep my boat, just about every year I have to repaint the boot stripe on my boat to account for higher or lower water. Still, I never seem to get it just right.
Now that's thinking outside the box- helium filled truck inner-tubes stuffed in an aft locker would probably do it!
03-31-2013 11:06 AM
Siamese
Re: Increasing flotation

Try adding some helium, cuz foam ain't gonna do it.

If you think about it, though, there's not much point in worrying too much about how she rides in the water. Because of the changing lake levels in Lake Michigan, where I keep my boat, just about every year I have to repaint the boot stripe on my boat to account for higher or lower water. Still, I never seem to get it just right.
03-31-2013 10:38 AM
Capt.aaron
Re: Increasing flotation

Quote:
Originally Posted by Irunbird View Post
Pretty funny, Aaron- if I didn't know any better, I'd swear you picked that up as a racer. I crew occasionally on much bigger boats than my little ultra light and some of the owners are incredibly anal about weight we bring on board and where it's stored; even on a big 56' swan!
No. actually I picked that up playing with Weebles (TM.) as a kid. apparently they wobble but won't fall down . It was my first of many frustrating bouts with applied physics. I could never knock one over anyway's.
I heard about some old coot when I was kid that took everything off his boat, vitaman jars, cut the handle off of his tooth brush, salt shaker etc. and weighed it. It was like a friken 1/2 ton or something. Then I took stability in my 200 ton class and Tankerman. We did the math on roll periods on something as small as a container top yay big taking a wave and filling with 6 inches of water, free surface calculations and I said "F" it, I'm going anal on low weight ratios. With my 8 foot draft on a 28' footer and serious low center of bouyancy, added with the air tight plastic tanks under my lazzeretts and if I were to empty my bow tank /slash crash bulkhead. I think my chances of a knock down are reduced greatly. AND. In my worst nightmare, I think I have crucial seconds added to how long it will take me to go down...maybe.
03-31-2013 10:34 AM
tomandchris
Re: Increasing flotation

Mattnj,

I think you answered your own question when you said it had been that way since you got her and it was common with Neptune's. The boat is what the boat is. The only thing that you can control is movable weight and that might cause the boat to be bow heavy and sail poorly. It is either designed to sit as she does or poorly designed.I think this is one of those things you have to live with or get a new boat.
03-31-2013 08:37 AM
Irunbird
Re: Increasing flotation

Pretty funny, Aaron- if I didn't know any better, I'd swear you picked that up as a racer. I crew occasionally on much bigger boats than my little ultra light and some of the owners are incredibly anal about weight we bring on board and where it's stored; even on a big 56' swan!
03-31-2013 08:12 AM
Capt.aaron
Re: Increasing flotation

I installed under each lazzerette, a tank. on the port side is a 50 gallon fuel tank, and on the sartboard is a 50 gallon water tank. I don't use them. I keep 'em there for buoyancy. They are there for long term back country trips only. I can slip out to the wilderness and protected water areas for a long time. The fuel tank was put for when i eventually put in an engine. Untill then it will remain empty. For ballance so will the water tank. I allready have a 65 gallon tank under the v-bearth, which is built in to the hull like a crash bulkhead. For general sailing and off shore they stay empty. I just assume they will keep the stern up in an emergancy. Maybe I'll pop up quicker or go down slower. I lost all that storage, but. I don't really have much crap on board. And all the carp I used to store there was just that, crap. It would turn into crap after a while anyway's from corrosion and not being used due to innacceasability. How many times did I clean those things out and find long lost items. Also don't store any thing that I do have above the water line on deck or inside the boat. I have bout 500 pounds of lead pigs I can use as moveable ballast in the bildge. All of my crap is stored low. I challenge every one to take every thing on board above the water line down to the tooth brush, and caculate it's collective weight. You may be surprised. A few courses in stability, like I took in My Tankerman, and then 200 ton capt. lisence, spawned my obbsession with keeping a low tansverse meta center.
03-31-2013 07:33 AM
hellosailor
Re: Increasing flotation

"My outboard is a Honda 8HP, so no excess weight there,"
Unless it was designed to carry a lightweight 2-stroke, and you've got a 4-stroke, or similar problem.
Matt, it really sounds like you don't have a clue how displacement and bouyancy work. There's really no way to do what you want to do. It really sounds like you're perceiving a problem that doesn't exist, or a problem that is intrinsic to the design, especially if this is known to be common in these boats.

And if the problem is in the design, it goes back to "see above" regarding displacement and design issues. Get rid of the boat and get one that suits you better, because the alternative will be custom rebuilding your hull.
03-31-2013 03:00 AM
celenoglu
Re: Increasing flotation

Adding anything inside boat will increase the weight which will cause immersion rather than floatation. Those foams will aid floatation when the boat sinks. Move everything possible to the head. Or change the design of the boat so that the rear is more wider or deeper.
03-31-2013 01:12 AM
PaulinVictoria
Re: Increasing flotation

Put the foam on the outside of the hull. Job done.
This thread has more than 10 replies. Click here to review the whole thread.

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


All times are GMT -4. The time now is 10:22 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.