Fantasy Boat Design - SailNet Community
 
LinkBack Thread Tools
post #1 of 9 Old 11-27-2008 Thread Starter
Senior Member
 
davidpm's Avatar
 
Join Date: Oct 2007
Location: Madison
Posts: 3,900
Thanks: 219
Thanked 58 Times in 50 Posts
Rep Power: 8
 
Fantasy Boat Design

A couple of the scariest risks for cruisers because of the lack of full-proof solutions is storm damage and pirate attack.
My fantasy solution to solve both of those problems is a submersible sailboat. At one foot the water pressure is about 15 PSI at one-hundred feet the pressure is about 58 PSI. It seem like a steel hull could be designed to handle that. Finding enough flood-able space is a problem that could be solved if the design allowed for damage to the vessel. For example the forward cabin would be flood able and it's contents would be damaged. Diving would not be for recreational purposes but for saving the boat from significant risk of loss.

Of course you better have enough pumping capacity to re-float the boat. It would suck if you ran out of battery power. An emergency battery bank for this purpose would probably be prudent.

How calm would the water be in a major hurricane 100' down.
Some storms last for a week or more, thats a lot of oxygen required.
I don't think this could be engineered even in theory but could you imagine how cool it would be if it could be?

Sadly it would be too heavy to sail well and cost a fortune but still??
davidpm is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 9 Old 11-27-2008
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,385
Thanks: 101
Thanked 304 Times in 294 Posts
Rep Power: 10
     
Glad to see you've virtually talked yourself out of it.... but to get you started with better data - it takes 27.68 inches of fresh water to create 1 psig... so your "1 foot down" is a little under .5 psi (.433), and your 100 feet down is 43.33 psig...pressures would be slightly higher in salt water.

So - the good news is you can build your fantasy a little bit lighter than you imagined

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is online now  
Quote Quick Reply Share with Facebook
post #3 of 9 Old 11-28-2008 Thread Starter
Senior Member
 
davidpm's Avatar
 
Join Date: Oct 2007
Location: Madison
Posts: 3,900
Thanks: 219
Thanked 58 Times in 50 Posts
Rep Power: 8
 
I guess that's why they make subs nuclear. It takes a lot of power for pumps air etc.
I've been reading about a few small recreational subs, so they are being made.
davidpm is offline  
Quote Quick Reply Share with Facebook
post #4 of 9 Old 11-28-2008
.
 
Join Date: Nov 2006
Posts: 10,851
Thanks: 0
Thanked 5 Times in 2 Posts
Rep Power: 13
         
Hey...any US ot Asian built old shoe does that already....they are 3 feet thick...they sail like shoes....and they are already half sunk anyway....

Last edited by Giulietta; 11-28-2008 at 09:17 AM.
Giulietta is offline  
Quote Quick Reply Share with Facebook
post #5 of 9 Old 11-28-2008
Senior Member
 
Join Date: Aug 2006
Location: wherever
Posts: 5,279
Thanks: 8
Thanked 17 Times in 16 Posts
Rep Power: 11
     
I don't want much...
50' loa X 15' beam with a 40' air draft and a 2' sea draft.
Sails @ 12 knots in an 6 knot breeze. Can easily handle 50 knot winds and 20' seas.
Burns .025 gallons per hour under power.
Requires no maintenance.
Costs under $100,000 fully equipped with everything.
I don't want much
xort is offline  
Quote Quick Reply Share with Facebook
post #6 of 9 Old 11-28-2008
Glad I found Sailnet
 
Bene505's Avatar
 
Join Date: Jul 2008
Posts: 3,807
Thanks: 14
Thanked 51 Times in 50 Posts
Rep Power: 8
   
A "battery keel" made out of 5 tons of Edison batteries. (Edison batteries last forever as long as you don't overcharge them. 50 years later they still go strong.) Store enough juice to have that electric drive. (At the marina make the power meter spin backwards?)

Side scan radar built into the keel, so you can discover things as you sail. (With 3D display in the cockpit, of course.)

Clear hull, for seeing way down. Add those underwater lights for veiwing at night.

Retractable water-line lengtheners -- hey, everybody's going to get one.

Remote control dinghy that drops you off and goes back to the boat and hitches itself back up. And then comes to get you later.

Danforth mushroom anchor -- no matter the direction of pull, it slants the mushroom at an angle to dig-in deeper.

Anchor cam -- see what's holding you in place. Comes with LED lights. (I know I could make one of these.) It would display on you chart plotter.

Breakfast buffet service at major anchorages. (I think they have this for coffee and bread at Block Island.) The ones I envision wouln't wake you up if you're sleeping in. They would bring the buffet table right to the side of your cockpit.
Bene505 is offline  
Quote Quick Reply Share with Facebook
post #7 of 9 Old 11-28-2008
midlife crisis member
 
AllThumbs's Avatar
 
Join Date: Jul 2008
Posts: 975
Thanks: 0
Thanked 10 Times in 8 Posts
Rep Power: 7
 
Quote:
Of course you better have enough pumping capacity to re-float the boat. It would suck if you ran out of battery power. An emergency battery bank for this purpose would probably be prudent.
What are you pumping? The water out? You don't need the water out, you need to add air. How will you do that in your fantasy?

I sail.
AllThumbs is offline  
Quote Quick Reply Share with Facebook
post #8 of 9 Old 11-28-2008
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
Of course you'd need to have a retractable rig, since the mast and such would cause a lot of excessive drag if they weren't retracted.
Quote:
Originally Posted by davidpm View Post
A couple of the scariest risks for cruisers because of the lack of full-proof solutions is storm damage and pirate attack.
My fantasy solution to solve both of those problems is a submersible sailboat. At one foot the water pressure is about 15 PSI at one-hundred feet the pressure is about 58 PSI. It seem like a steel hull could be designed to handle that. Finding enough flood-able space is a problem that could be solved if the design allowed for damage to the vessel. For example the forward cabin would be flood able and it's contents would be damaged. Diving would not be for recreational purposes but for saving the boat from significant risk of loss.

Of course you better have enough pumping capacity to re-float the boat. It would suck if you ran out of battery power. An emergency battery bank for this purpose would probably be prudent.

How calm would the water be in a major hurricane 100' down.
Some storms last for a week or more, thats a lot of oxygen required.
I don't think this could be engineered even in theory but could you imagine how cool it would be if it could be?

Sadly it would be too heavy to sail well and cost a fortune but still??

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #9 of 9 Old 11-28-2008
Glad I found Sailnet
 
Bene505's Avatar
 
Join Date: Jul 2008
Posts: 3,807
Thanks: 14
Thanked 51 Times in 50 Posts
Rep Power: 8
   
Quote:
Originally Posted by davidpm View Post
...A couple of the scariest risks for cruisers because of the lack of full-proof solutions is storm damage and pirate attack...
Regarding pirate attack, the passive measures like submerging/hiding only work if there's an active measure (good guys with guns) on the way to help. Those active measures work better IMHO because the pirates will figure out a way to work around the passive measures, jut like you pointed out. Maybe they get grappling hooks and snag you at 100 feet deep.

So my anto-pirate fantasy sailboat is really one where the world actively encourages criusers to have your own guns on board. Then you can feel secure against pirates, and maybe even help out a fellow cruiser in need.
Bene505 is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

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:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Modern Hull forms and Motion Comfort Jeff_H Sailboat Design and Construction 193 10-31-2013 09:29 AM
THE Yacht Builder List T37Chef Boat Review and Purchase Forum 26 07-08-2011 05:51 AM
Production blue water boats JakeLevi Boat Review and Purchase Forum 73 07-31-2009 10:07 PM
What can you tell from the numbers? brazilnut Boat Review and Purchase Forum 10 07-01-2009 04:09 PM
The Search for the First Boat - long learning curves pmoyer Boat Review and Purchase Forum 45 12-20-2008 01:28 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome