I’ve been watching some film of the Croatian design - VISS - with the odd deck/hull extensions at mid hull and transom points and wonder if they’re legal? It’s a while since I’ve read the rule but wouldn’t they fall foul of the ‘hollows’ restrictions?? I assume they’re legit because the boats have been raced but I wondered what the story was??

Just looking at the rules I have to hand, the rules about hollows seem to apply to "the undersurface" of the hull, not the topsides.

I am though curious why the viss has those. Certainly looks different; a fellow member said to me "ugly" lol. 

Fortunately I'm not yet competent enough to need to worry about hull shape.... 😁  Nonetheless I found the coverage - close-ups, and experienced commentary on how/why - massively instructive. Well done Gladstone

 

7 minutes ago, Colin Helliwell said:

Just looking at the rules I have to hand, the rules about hollows seem to apply to "the undersurface" of the hull, not the topsides.

I am though curious why the viss has those. Certainly looks different; a fellow member said to me "ugly" lol. 

Fortunately I'm not yet competent enough to need to worry about hull shape.... 😁  Nonetheless I found the coverage - close-ups, and experienced commentary on how/why - massively instructive. Well done Gladstone

 

I know what you mean about 'hull' but where do the undersurfaces end and top surfaces begin and I would have thought the intention is to avoid hollows in areas which are 'wetted' and that includes when heeled, having said that my One Metre has a chine running from the bow to maybe 30-40% of the overall hull length and you might argue that the underside of that is a 'hollow' but obviously it isn't!

I'm not sure if they look ugly to me but they must be of some benefit otherwise they wouldn't be there and the benefit must outweigh the drag they create?

No doubt someone has written reams on this already but I haven't seen anything! 

Those hollows didn't look "wetted" to me, even heeled. (Unless keel falls off.... look out for that unfortunate GBR... very LeBon/Drum).

I wondered if its to create additional buoyancy at the gunwhales when heeled. 

Just now, Colin Helliwell said:

Those hollows didn't look "wetted" to me, even heeled. (Unless keel falls off.... look out for that unfortunate GBR... very LeBon/Drum).

I wondered if its to create additional buoyancy at the gunwhales when heeled. 

I'm assuming they're in the water when heeled? Ive seen some film but not nearly as much as you so it's just my impression. They can't do much in light airs but you are right about buoyancy, might assist tacking when close hauled but then they have equally buoyancy effect so you could argue some resistance to heeling when tacking/gybing ??

Hi, surely if you applied the rule about hollows to the deck, would this not mean that virtually all but flat decked IOM's are not compliant. A skiff deck or a mast dish well, would contravene the rule?

I'm assuming that the shaped deck is to try to seal the rig to the deck, America's Cup style. Hopefully a yacht designer will be along to explain.

Gents

Having followed your posts and reviewed the current class rules. The VISS design seems to be sound. Any interpretations to hollows in the hull within the class rules talk about below the waterline when the boat is upright.
 

Therefore, that is why it’s allowed for VISS to have its hull shape, because any hollow or alternative deck form is above the waterline. I can only assume the deck is shaped for airflow on to the rig?

Regards

JT

Edited November 1, 20241 yr by John Taylor

35 minutes ago, John Taylor said:

Gents

Having followed your posts and reviewed the current class rules. The VISS design seems to be sound. Any interpretations to hollows in the hull within the class rules talk about below the waterline when the boat is upright.
 

Therefore, that is why it’s allowed for VISS to have its hull shape, because any hollow or alternative deck form is above the waterline. I can only assume the deck is shaped for airflow on to the rig?

Regards

JT

Thanks for clarifying John. So the winglets are for aerodynamic not hydrodynamic reasons? Interesting. 

And for £5,300 it aught to sail itself and win every time!! Dream on! 

Does it come with a free car?

 

2 hours ago, Brian Mc Jury said:

Does it come with a free car?

 

And a chauffeur to drive it!!

Hi I actually ordered a Viss while in development so Colin will get a good look at Lincoln. It is my retirement present to myself and is cheaper than the web site suggests depending on what you want.  They have kept me informed as they have developed it and started production and their English is better than mine.  The coverage of the worlds was brilliant.  As a newbie they explained what was going on and why various skippers were doing things.  

6 minutes ago, Richard Jutsum said:

Hi I actually ordered a Viss while in development so Colin will get a good look at Lincoln. It is my retirement present to myself and is cheaper than the web site suggests depending on what you want.  They have kept me informed as they have developed it and started production and their English is better than mine.  The coverage of the worlds was brilliant.  As a newbie they explained what was going on and why various skippers were doing things.  

I hope that you like the boat Richard. Not cheap but if it's as good as you hope then it should last years! Good to read that the manufacturers are good communicators to.

Thanks Simon. I just need to learn to sail well although we have some good sailors at Lincoln who really help us newbie’s improve.  I was or in theory still are on a waiting list for other models and I feel that’s been the difference with Sailboat RC they obviously run it as a buisness.

52 minutes ago, Richard Jutsum said:

Thanks Simon. I just need to learn to sail well although we have some good sailors at Lincoln who really help us newbie’s improve.  I was or in theory still are on a waiting list for other models and I feel that’s been the difference with Sailboat RC they obviously run it as a buisness.

Well Richard, you’re a member of a good club so that’s a plus point to start off with. When you are new to sailing then it’s hard enough just to get the boat moving but it’s the same for everyone and the people who win the races started from where you are, and if it was easy then it wouldn’t be fun. Once you get beyond the basics of boat handling then it’s important to start racing because that’s the only way to improve and there’s always the boat in front to race against - and this is how you start to get to grips with the racing rules (new set, post Olympics available any time now) . I’d say that a typical beginner needs probably 9-12 months regular sailing to get to a point where they can have a go in an open race. It’s just the same as a club race - you always have someone to race against- but you are in a much bigger pool of experience and once you’ve dipped your toe into the water and done a couple of Open races then you’ll enjoy it. The only way to get better is to sail against better slippers and it all takes time. 3 years down the line you’ll be vastly better than you are now but don’t get discouraged- it takes time. If you’re also going to sail other classes then be aware that the setting up of a boat can vary between classes so that’s a complication but regular sailing is the key. And the great thing about owning a VISS - or any other leading design- is that you can’t blame the boat, it’s up to you to catch up with it! Enjoy your sailing!!