jimi
Well-Known Member
The question is: is a Contessa 32 stable ... or is it just guaranteed to come right way up after being rolled?
How easy is it to roll a Contessa 32
- Thread starter jimi
- Start date
Phoenix of Hamble
Well-Known Member
A good point....
The AVS is only half the story..... it tells at what point a boat will self right.....
The area under the curve however tells how unlikely it is to reach that point....
so a boat with a lower AVS could easily have much less likelihood of getting there....
The AVS is only half the story..... it tells at what point a boat will self right.....
The area under the curve however tells how unlikely it is to reach that point....
so a boat with a lower AVS could easily have much less likelihood of getting there....
gandy
Well-Known Member
Also tells how stable it will be upside-down - ie whether it will roll back up, or sit there upside down with its keel in the air like that Open 60 in the Southern Ocean.
alant
Well-Known Member
Find out in next weeks 'surviving disaster'.
flaming
Well-Known Member
But surely being rolled by a wave is also a function of the area the wave has to hit. So a boat with a low freeboard will stop less of the wave and will have less force knocking it over. So in this respect a contessa will have an advantage over the typical modern high freeboard fat cruiser.
tome
Well-Known Member
Seem to recall studying the stab data of a C32 quite closely. You're right that she'd still be rolled but owners love to imagine she'll come up again faster than a robbers dog, if only to be rolled again
Great boats for sailing round the cans but agree you'd have to be dimensionally challenged
Great boats for sailing round the cans but agree you'd have to be dimensionally challenged
Phoenix of Hamble
Well-Known Member
I would have thought that the rolling action of a wave has little to do with wave impact on the topsides, and more to do with the difference in speed of the different parts of the wave having different actions upon the lower and upper parts of the underwater sections.... ie a steep wave with breaking crest will push the boot topping over quicker than the lower deeper part of the wave will the keel....
Only speculation I might add....
Only speculation I might add....
flaming
Well-Known Member
Hmmm, could be I suppose. I would have thought it was the impact of the broken water myself though.
I do remember reading a piece a few years back about a singlehanded girl who rolled a contessa 32 and was thought to have been the first person to do so.
I do remember reading a piece a few years back about a singlehanded girl who rolled a contessa 32 and was thought to have been the first person to do so.
woody001
Well-Known Member
My first boat when i was 19 a few years ago was a carter 30, i loved her, she was fast and a superb sea boat, bit ugly, but the sail made up for that by miles...cant rate them high enough.
tumbleweed hull, lead keel, big genny. All for 17k, bargain! I saw a 33 going for 19k at southsea.
tumbleweed hull, lead keel, big genny. All for 17k, bargain! I saw a 33 going for 19k at southsea.
trouville
N/A
Well it had more headroom than my boat!
I dident go below i looked in from the cockpit g&t in hand!
It was walm then Something keeps going wrong with the weather?
I dident go below i looked in from the cockpit g&t in hand!
It was walm then Something keeps going wrong with the weather?
Sui Generis
Well-Known Member
Totally agree. One should also consider the reason that the CO32 comes back up again - buoyancy in the coachroof? Why do self - righting lifeboats have a large superstructure?
Going back to Jimi's original question, I don't think that the boat has yet been designed which will not be rolled through 360º in extreme circumstances.
What I would not like to be in is a yacht which becomes "stable" in the inverted position so for me it is not the AVS per se but whether the thing will recover from a roll and get me home.
CO32's do certainly give me a bang on the head (I'm tall) but I'd rather be in the pub with a drink in my hand and a lump on the head, than in the drink with my head in my hand and a lump of a boat above me - I vote CO32.
Going back to Jimi's original question, I don't think that the boat has yet been designed which will not be rolled through 360º in extreme circumstances.
What I would not like to be in is a yacht which becomes "stable" in the inverted position so for me it is not the AVS per se but whether the thing will recover from a roll and get me home.
CO32's do certainly give me a bang on the head (I'm tall) but I'd rather be in the pub with a drink in my hand and a lump on the head, than in the drink with my head in my hand and a lump of a boat above me - I vote CO32.
Sheff
Well-Known Member
[ QUOTE ]
But surely being rolled by a wave is also a function of the area the wave has to hit. So a boat with a low freeboard will stop less of the wave and will have less force knocking it over. So in this respect a contessa will have an advantage over the typical modern high freeboard fat cruiser.
[/ QUOTE ]
Well that's ok then. Boat stays upright but wave washes peeps in cockpit overboard. /forums/images/graemlins/smile.gif
But surely being rolled by a wave is also a function of the area the wave has to hit. So a boat with a low freeboard will stop less of the wave and will have less force knocking it over. So in this respect a contessa will have an advantage over the typical modern high freeboard fat cruiser.
[/ QUOTE ]
Well that's ok then. Boat stays upright but wave washes peeps in cockpit overboard. /forums/images/graemlins/smile.gif
webcraft
Well-Known Member
If I remember correctly the Co32 has an AVS of 178 degrees . . . so will always roll upright immediately in any weather that could possibly cause a knockdown.
As ANY boat is almost certain to be rolled aby a fully breaking wave more than 1.3x the beam of the boat I would take a Co32 offshore before most AWBs any day . . . even though their substantially wider beam means it would take a higher breaking wave to roll them.
Better to roll a little sooner and come up again IMHO . . .
- Nick
As ANY boat is almost certain to be rolled aby a fully breaking wave more than 1.3x the beam of the boat I would take a Co32 offshore before most AWBs any day . . . even though their substantially wider beam means it would take a higher breaking wave to roll them.
Better to roll a little sooner and come up again IMHO . . .
- Nick
jimi
Well-Known Member
So basically they are less stable upside down as well as right way up?
machurley22
Well-Known Member
[ QUOTE ]
So basically they are less stable upside down..
[/ QUOTE ]So that's all right then.
So basically they are less stable upside down..
[/ QUOTE ]So that's all right then.
tome
Well-Known Member
[ QUOTE ]
So basically they are less stable upside down as well as right way up?
[/ QUOTE ]
Depends how you look at it
So basically they are less stable upside down as well as right way up?
[/ QUOTE ]
Depends how you look at it
webcraft
Well-Known Member
erm . . . AVS of 178 means they are TOTALLY UNSTABLE upside down.
kinda worrying, eh?
- N
kinda worrying, eh?
- N
ashanta
Well-Known Member
What would you rather be sailing in survival conditions, a Contessa 32, or a 32 foot Jen/Ben/Bav?
A T31! /forums/images/graemlins/laugh.gif
A T31! /forums/images/graemlins/laugh.gif
gandy
Well-Known Member
[ QUOTE ]
erm . . . AVS of 178 means they are TOTALLY UNSTABLE upside down.
kinda worrying, eh?
- N
[/ QUOTE ] Yes, if you want to stay upside down.
erm . . . AVS of 178 means they are TOTALLY UNSTABLE upside down.
kinda worrying, eh?
- N
[/ QUOTE ] Yes, if you want to stay upside down.
jimi
Well-Known Member
Another point is that the AVS is, I beleive, calculated in a static flat sea environment. I presume that even with an AVS of say 110 the save type of wave that rolled you in the first place may roll you upright again?