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If you don't know what make it is post a photo somewhere and link to it and someone is bound to recognise it...

I accidentally came across a possible alternative a few years ago which I've never felt quite brave enough to try for real. That is to varnish/paint the normal way, and then when the surface is very tacky apply peel ply. When fully cured remove peel ply. I'm sure you can guess the accident, and it certainly seemed to have a lot of potential for a less aggresive rough surface. It seems to me it ought to be a very neat solution for a varnished interior especially.

Steve Clark, the American Catamaran (Cogito the C Class) and IC Sailor has gone on record as saying that GPS VMG without true wind data is at best very misleading. Apparently he found when working up Cogito that settiing up VMG to the leeward and windward mark or even VMG to three miles upwind was useless due to the amount of variation that apparent wind and all the rest of it puts in the mix.


On the other hand there's considerable potential for explaining how your day went to your mates... See this by 12 (footer) sailor EdB posted on Sailing Anarchy...





I wouldnt want to see GPS readouts visible on boats I sailed against, but I like the idea of capturing the data for playback later. Prove that the only reason fred got ahead was that atrociously jammy shift on the last beat, that sort of thing...

[quote by=Little_Bo link=Blah.cgi?b=Cool1,m=1173089333,s=3 date=1173106281]it was good to hear 'our' music 3 or 4 stands away [/quote]

Bet you were popular... that opinion probably wasn't shared by the people manning stands in that 3 or 4 stand radius!

Mike is of course right. That production Cherub is a *much* simpler build than a National. The pole and sail aren't really a lot of extra work with a build worked out in the way that one is. A Cherub built to the most sophisticated spec of some recent boats with stump rig, foredeck,full height spine etc would be a lot more expensive - at least 50% more labour at a guess. I would think that if I wanted Mike or Andy Paterson to build me a new Cherub to the equivalent setup of my last one I would be talking 11K plus.

[quote by=rick_perkins link=Blah.cgi?b=Cool1,m=1171995144,s=27 date=1172222518]Not similar at all ...[/quote]
Function my boy, function.

[quote by=rick_perkins link=Blah.cgi?b=Cool1,m=1171995144,s=13 date=1172063300]
it seems to me that inflatable battens are uncontrolled and you could have as many as you like of any length ...[/quote]

I'm neither an N12 sailor or an RYA measurer, but I would have thought the duck principle comes into place: if it looks like a duck, walks like a duck, swims like a duck, quacks like a duck etc, then its a duck.
Seems to me that your batten material is unrestricted then anything that acts as a batten is subject to your batten rules.

I just had a look at my 1936 Uffa Fox book: I can't be sure, but from his drawings it looks as if the original Uffa King design sported a fixed rudder!

An interesting comment on that sail area calculation is that it seems the N12 fore and aft sails were substantially bigger than Cherub ones up intil 1984, and the same size from 84 through to 1997. Actually I rather thought they were at the time when I think about it.

Seems a strange thing to want to source... I'm a determined spar non-builder but even I made the snout tube: best way to get a decent fit

[quote by=Roger_Brisley link=Blah.cgi?b=Cool,m=1164825767,s=58 date=1165962669] A tow is no substitute for sailing,[/quote]

Exactly so, but equally empirical observation from sailing/racing results is no substitute for repeatable science. The two are complementary.

In terms of success in introducing new classes without them dying after 10 years and gaining International acceptance then the most successful designers of the last thirty years are the Bethwaites. They're also the only people who have a consistent pogram of tow tesing so they have some real data about how hull shapes perform. I don't believe that's a co-incidence.

In my time sailing Cherubs I was never sure who was fast because of their boats, and who was fast in spite of them. Hull shape is really such a small percentage of total performance I've never been prepared to say what is hull and what is other factors. Which is more important, early planing or low drag high displacement speeds? Only one way to find out!

Anyway science is fun and interesting. For some of us anyway. For others its mindless ly boring. But then there are people who don't like going sailing!