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Posts Made By:
NevisDog
Forum:
Rules of the Road, Regulations & Red Tape
12-03-2019, 12:54
Replies:
896
Rule 5 -- Is Single-Handing Illegal?
Views:
66,695
Posted By
NevisDog
Re: Rule 5 -- Is Single-Handing Illegal?
"You should not believe everything you read on the web" - yes, so where is the definitive answer D'head promised us, from USCG and UK MoT? Never happened - why not? All these singlehanded races going...
Forum:
Monohull Sailboats
20-12-2018, 23:23
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
So, give it then.
How do the different hull designs they have sailed compare in big seas?
At least TRY to stick to the subject.
How do they compare for comfort - in big seas?
How do they...
Forum:
Monohull Sailboats
20-12-2018, 23:11
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Wow! The knives are out. Condemn IOR rating rule and the boats it spawned, leading to less seaworthy, less sea-kindly, and definitely less stable designs, as many have done when they realised what...
Forum:
Monohull Sailboats
20-12-2018, 21:25
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Musta been hogwash when we were rolled by that wave after running under bare poles for 3 days. I musta dreamt it.
Forum:
Deck hardware: Rigging, Sails & Hoisting
20-12-2018, 10:52
Replies:
48
Rain down the mast
Views:
9,397
Posted By
NevisDog
Re: Rain down the mast
I'd reword that to something like "people carefully tap and secure finely tapered wood wedges evenly around the entire mast, to support it uniformly and without damage." Or some sort of rubbery goo...
Forum:
Construction, Maintenance & Refit
20-12-2018, 10:39
Replies:
18
Grounding , stringer - hull separation
Views:
3,406
Posted By
NevisDog
Re: Grounding , stringer - hull separation
In many areas, grounding is an almost daily fact of life. We keep the speed to a minimum though. :wink:
Yes a lot can be done to transfer the fore-and-aft keel loads beyond the ends of the stump...
Forum:
Monohull Sailboats
20-12-2018, 10:19
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Mate, you don't need our advice, you have an eye for this. :smile:
Those of us who appreciate the virtues of full-keel boats will love the deep centreline on this one - it makes a helluva...
Forum:
Monohull Sailboats
20-12-2018, 09:50
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
You wouldn't want a Perry Valiant 42 or 47??? Enlighten us, those of us who drool at the very thought... (Okay I get the encapsulated iron thing but hey, no boat is perfect.)
Forum:
Monohull Sailboats
20-12-2018, 00:38
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Someone here will recognise her but Bob Perry is one of the finest yacht designers ever - I just checked on sailboatdata.com and of course he designed the Valiant 47 and the Tayana 47, two of the...
Forum:
Monohull Sailboats
19-12-2018, 23:52
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Lots of questions - glad to see folks finally paying attention to stability data - it is the most critical aspect of any boat, bar none, when the chips are down, but is often barely recognised when...
Forum:
Monohull Sailboats
19-12-2018, 21:23
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
AVS and STIX combined make up Cat A - Americans don't seem to want to recognise Cat A much so I guess they'd be even less enthused over STIX. Feel free to offer pearls of wisdom though - just don't...
Forum:
Monohull Sailboats
19-12-2018, 18:49
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Yea, you are. :smile:
Blood sweat and tears went into that standard, years of pushing and haggling. :banghead: Sure it's a minimum - falling below Cat A is about as low as a boat could get - but...
Forum:
Monohull Sailboats
19-12-2018, 16:21
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
More correct to say bigger boats will need bigger waves before stability becomes critical. In equivalent sea conditions, it doesn't matter if you are testing a tiny scale model or a super-tanker, the...
Forum:
Monohull Sailboats
19-12-2018, 16:06
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Cat A is not self-regulation - it is law in the EU. It took many, many years to negotiate (of course). Boat industry fought it all the way but it was pushed on by just a couple of guys who recognised...
Forum:
Monohull Sailboats
19-12-2018, 12:44
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Think about it - that's exactly the same as saying "they will not stay upright, but will take a little longer to invert." Longer to invert than a Cat A? Cat A is minimal, not as good as Cat A is...
Forum:
Monohull Sailboats
19-12-2018, 11:49
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Look again at the GZ curve published for the HR 57 cruiser then tell me it won't stay inverted. Size alone will (hopefully) keep that thing outa trouble, not its stability curve. Other similar...
Forum:
Monohull Sailboats
19-12-2018, 11:12
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
I just wanted to expand on this one point. Rolling heavily going downwind is an indicator of good high-angle stability. Modern downwind sleds are made more comfortable downwind, at least initially,...
Forum:
Monohull Sailboats
19-12-2018, 09:47
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Thanks Dale, Paul for pushing the other side of the argument - I'm kinda hoping for some consensus that might help the OP, so it's no good saying 'it all depends on which modern design', and 'nothing...
Forum:
Monohull Sailboats
18-12-2018, 20:20
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Briefly:
(1) Vessel safety depends on structural strength, as mentioned above. Try not to confuse these two issues.
(2) It's not what I think - it's the findings of the report into the '79 disaster...
Forum:
Monohull Sailboats
18-12-2018, 19:41
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
I don't believe any of the few full-keeled yachts out there ('79 Fastnet) got knocked down. It would take more than a force 10 to knock down any full-keeler I've sailed on. And arguing that one type...
Forum:
Monohull Sailboats
18-12-2018, 19:12
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Paul: "I’ve got to tell you that the J/30 is the best goddamned sailboat in the world for its intended purpose. Only once did I get rolled down by a huge wave. And, I’ve got coffee stains on the...
Forum:
Monohull Sailboats
18-12-2018, 17:54
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Then you have never encountered waves out of proportion in steepness and size to your hull size. Read the Fastnet report for better insight.
Forum:
Monohull Sailboats
18-12-2018, 16:41
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
??? If that's the case then any discussion of boat types and their relative behaviour is futile. Each type is loved by someone, but that shouldn't prevent discussion of the type, whether in broad...
Forum:
Monohull Sailboats
18-12-2018, 16:22
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
Oops - my mistake, was thinking of those Volvo ocean racers; those modern sleds all look the same to me, you'd have to pay me to sail in one (and that's not gonna happen). :smile:
Forum:
Monohull Sailboats
18-12-2018, 14:04
Replies:
379
Hull Shapes and Behaviour in Heavy Seas
Views:
34,687
Posted By
NevisDog
Re: Hull Shapes and Behaviour in Heavy Seas
It means any boat fully crewed by professionals will survive - but will they survive in comfort? Are they in constant danger of being swept overboard? Can the hullform survive the conditions without...
Showing results 1 to 25 of 500
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