Go Back   Yachting and Boating World Forums > Practical Boat Owner's Reader to Reader

Practical Boat Owner's Reader to Reader Share practical, hands-on information, hosted by Practical Boat Owner magazine.

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 03-11-09, 21:54
alexrunic's Avatar
alexrunic alexrunic is offline
Registered User
 
Join Date: Dec 2007
Location: Lincs
Posts: 204
Question Over Loading??

Hi,
I was wondering what the opinion was on over loading a yacht and where the weight is placed?

I have a macwester rowan 22ft which is a heavily built long keeler and weighs about 2.5 tonnes. I have fitted a 120L (120 KG) flexible triangular water tank in the bowes as the only place it could go with out making her list. I currently have 10 meters of 8mm chain and 50 meters of 12mm Nylon anchor warp. I'm planing or up grading to 30 meters of 8mm chain (43 kg) + warp. I don't want to take any risks as do a fare amount of offshore sailing.

Do you think?

1) I'm already overload

2) I would be if I added the extra chain or I will be ok.

thanks

alex
__________________
www.skegnessyachtclub.co.uk
Reply With Quote
  #2  
Old 03-11-09, 22:00
sailorman's Avatar
sailorman sailorman is offline
Registered User
 
Join Date: May 2003
Location: East Coast
Posts: 17,554
Default

Quote:
Originally Posted by alexrunic View Post
Hi,
I was wondering what the opinion was on over loading a yacht and where the weight is placed?

I have a macwester rowan 22ft which is a heavily built long keeler and weighs about 2.5 tonnes. I have fitted a 120L (120 KG) flexible triangular water tank in the bowes as the only place it could go with out making her list. I currently have 10 meters of 8mm chain and 50 meters of 12mm Nylon anchor warp. I'm planing or up grading to 30 meters of 8mm chain (43 kg) + warp. I don't want to take any risks as do a fare amount of offshore sailing.

Do you think?

1) I'm already overload

2) I would be if I added the extra chain or I will be ok.

thanks

alex
1/ yes especially up in the Bows - 6 m/m chain more than adequate for 22 ft

2/ remove 8 m/m chain add as much 6 m/m as you can stow without upsetting trim ( try getting it further Aft by the main bulkhead ) + the 50m of warp you already have.
Reply With Quote
  #3  
Old 03-11-09, 22:35
fireball's Avatar
fireball fireball is offline
Registered User
 
Join Date: Nov 2004
Location: Chichester
Posts: 9,654
Default

tbh - if you're offshore sailing then you won't need the chain in the bow - iirc there is a vast area under the cockpit and starboard side that is wasted - if you can use that for stowage then you'll balance up some of the chain.
__________________
Bavaria keels don't fall off, they just wobble slightly.
Reply With Quote
  #4  
Old 04-11-09, 01:39
oldsaltoz oldsaltoz is offline
Registered User
 
Join Date: Jul 2001
Location: Australia, East coast.
Posts: 3,618
Smile

You need to keep both ends light to the best performance and safety.

We used to have a few sails stowed up frond but the under 'A' berth lockers were kept empty. The anchor had about 5 m of chain and warp, stowed midship when racing. All water on board was stowed in 25 litre containers with space for one under the galley sink that had a lid that screwed to all drums and let to the sink pump, the others were stowed close to midships in the under bunk storage.

If you must have the bag up front, consider only part filling if going away for more than a few days and storing water midships in containers and use the water from up front first.

Avagoodweekend......
__________________
Growing old is unavoidable. However, growing up is still optional.
Reply With Quote
  #5  
Old 04-11-09, 01:58
William_H William_H is offline
Registered User
 
Join Date: Jul 2003
Location: West Australia
Posts: 4,471
Default Over loading

I think you will find that overloading is really a question of degrees and that the boat will be OK however as already said weight should not be in the ends of the boat as this will promote hobby horsing. (pitching rhythmically).

It is always a good idea to have multiple water containers. If one goes bad you have alternative and if a source is a bit doubtful you can just fill one container and use for washing etc. Flexibility is good.

I would be inclined to say don't fit the extra chain or if you do stow it under the floor midships for use only in dire anchoring situations.

You should check the trim fore and aft once everything is decided. You need to don so with people in the cockpit as if you were sailing. (or in the cabin if you have autopilot)

A heavy bow will tend to take more water over the bow but will cut through a small wave nicely without slamming. good luck olewill
Reply With Quote
  #6  
Old 04-11-09, 11:24
snowleopard's Avatar
snowleopard snowleopard is offline
Registered User
 
Join Date: May 2001
Location: Melbourne
Posts: 14,309
Default

Work it out for yourself. Here's how:

LWL x beam x 7.5

Measurements in metres, the answer is the load in Kg to sink the boat by 1 cm.

Take a look at your waterline and ask yourself how far down you reckon it's safe to load her (or when you need to paint on another strip of antifoul).
__________________
One hull good, two hulls better.
Reply With Quote
  #7  
Old 04-11-09, 12:01
oldharry's Avatar
oldharry oldharry is offline
Registered User
 
Join Date: May 2001
Location: North from the Nab about 10 miles
Posts: 4,507
Default

Overloading is not the issue - and as has already been said, why put such heavy chain in? You will never need it,, and when it matters (i.e. after a windshift in that nice quiet anchorage has put you on a lee shore in a rising wind), the considerable extra weight might just tip the balance and make it impossible to lift it back aboard quickly.

You need to be far more concerned about fore and aft trim. I do not know how sensitive to trim the Rowan is, but all that weight up forward may well seriously affect her sailing characteristics, as well as the way she behaves in a rough sea. Excessive forward weight firstly causes the boat to pitch much more - making life that much more uncomfortable and dodgy for the crew. Secondly you may find she gripes, needs more weather helm, and may be have difficulty going about. She may not lift to the seas so well, and take a lot more water over the bows, slowing her down. Boats vary, and in some excessive forward trim doesnt make a lot of difference, while others become almost unmanageable. Whichever, the result of so much weight will vary from negligible, unless racing, to being virtually impossible to handle.

And 'offshore'? Do you actually mean several hundred miles out, or shorter channel hopping and coastal passage making? If the latter then you need to have your ground tackle ready for immediate use - not stowed down aft where you cannot get it in an emergency!
__________________
If you cant fix it, get a bigger hammer...
Reply With Quote
  #8  
Old 04-11-09, 12:39
Twister_Ken's Avatar
Twister_Ken Twister_Ken is offline
Registered User
 
Join Date: May 2001
Location: 'ang on a mo, I'll just take some bearings
Posts: 17,178
Default

120kg of water is about the equivalent of having a fat lad sat on the foredeck. The extra chain, about the same weight as a slim lass. Would that ruin the boat and handling? Doubt it.
__________________
There are three kinds of people:
Those who learn by reading.
Those who learn by observation.
Those who have to pee on an electric fence for themselves.
Reply With Quote
  #9  
Old 04-11-09, 13:04
orbister orbister is online now
Registered User
 
Join Date: Jun 2004
Location: Castle Douglas, SW Scotland
Posts: 905
Default

Quote:
Originally Posted by Twister_Ken View Post
120kg of water is about the equivalent of having a fat lad sat on the foredeck. The extra chain, about the same weight as a slim lass. Would that ruin the boat and handling? Doubt it.
I was just about to post the same.
Reply With Quote
  #10  
Old 04-11-09, 13:16
MonniotC MonniotC is offline
Registered User
 
Join Date: Sep 2006
Location: Sussex
Posts: 39
Default

Quote:
Originally Posted by orbister View Post
I was just about to post the same.
moi aussi
__________________
Chris
Reply With Quote
  #11  
Old 04-11-09, 18:55
oldharry's Avatar
oldharry oldharry is offline
Registered User
 
Join Date: May 2001
Location: North from the Nab about 10 miles
Posts: 4,507
Default

Quote:
Originally Posted by Twister_Ken View Post
120kg of water is about the equivalent of having a fat lad sat on the foredeck. The extra chain, about the same weight as a slim lass. Would that ruin the boat and handling? Doubt it.

Didnt say it would - I said it might affect it. I have had 22 footers that really didnt give a monkeys for trim - just blew along anyway. I have also come across larger boats where that much weight forward made a quite perceptible difference to the handling. Personally I would reckon a 22 footer with an 18 foot or thereabouts waterline would not do so well with a 'large lady' mounted up forrard. And - like the lady - some will, some wont!
__________________
If you cant fix it, get a bigger hammer...
Reply With Quote
  #12  
Old 04-11-09, 21:23
alexrunic's Avatar
alexrunic alexrunic is offline
Registered User
 
Join Date: Dec 2007
Location: Lincs
Posts: 204
Smile

Thank you everyone for your advice. when I say offshore i mean trips across from the wash to the Netherlands 150 nm or so not trans Atlantic. most of my sailing is in the wash and not always in flat seas so need to worry about handling there too.

I would not want to move my anchor but I'm going to consider changing to 6mm I do a lot of anchoring in 2-3 knot tides so thought the bigger the better and she came with 8mm fitted already.

as suggested I think i will only half fill the tank and use separate containers for spare water. I will try to stow them under berths in the main cabin

I just wanted confirming my own doubts about me overloading / misplacing weight. which looks like i was right to be concerned.

thanks everyone
__________________
www.skegnessyachtclub.co.uk
Reply With Quote
  #13  
Old 04-11-09, 21:46
sailorman's Avatar
sailorman sailorman is offline
Registered User
 
Join Date: May 2003
Location: East Coast
Posts: 17,554
Default

150 mls in a 22 footer well done i say.
we have a large CQR lashed under a quarter berth its been there 30 yrs & not got wet yet
Reply With Quote
Reply

Bookmarks

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

Forum Jump


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.