Notable open & development class racers....

Moth's and 18's use movable ballast? That's news to me. Since when has crew weight been declared ballast? Are you saying that Rohan Veal is ballast? That might get you removed from his Xmas card list.

Did someone say something about movable ballast in this thread?

 

Notable Development and Open Classes

RHOUGH:"Did someone say something about movable ballast in this thread?" Why, yes-early on-it is one of the most notable technologies being used in many Open and Development Classes....
+++++++++++

Monohull development Speed and Speed/Length Ratio's:
=========================
---12.75' Moth foiler-max speed (so far): 27.9 knots-uses movable ballast. Nom-S/L=8.41
---Aussie 18-max speed-(so far): 30 knots-uses movable ballast. S/L=7.07
---VOR70-max speed-(so far):40.6knots; 23.45 knots for 24 hours-uses movable ballast.S/L=4.85
---Alfa RomeoII(sistership to Wild Oats)-max speed-(so far):35 knots-uses movable ballast.S/L=3.62
---Open 60-max speed-so far-30 knots-uses movable ballast. S/L=3.87
------------------

 

Leopard

Farr designed (big) canter:
index.php?act=Attach&type=post&id=36859
Address:http://www.sailinganarchy.com/forums/index.php?act=Attach&type=post&id=36859

 

Doug:
I think there's an important difference between a sprint and an ocean passage. And I agree with RHough's implication that the latter is the real test of a boat's efficacy as a vehicle.

 

Movable ballast is also used on;

MacGregor 26 powersailors

Optimists

International Dragons

The 1880s designed New Haven Dinghy

Catalina 22s

And many other very slow boats (the Dragon isn't slow).

In fact just about every racing boat uses movable ballast, so promoting movable ballast is a bit like promoting self-draining cockpits; yes the fast boats have them but so do many of the slow boats.

And of course, there has always been a vast difference between human ballast and movable ballast.

 

Of corse, with human ballast you have to pick 10 guys to go sailing. With movable ballast you can go alone and you just have to put water on the right tank

 

I don't have a massive problem with (non-powered) water ballast boats, Vega. But is IS possible to sail alone without 10 guys. Joshua Slocum, Eric Tabarly and Robin Knox-Johnston (most of the time), and the early BOC boats managed to sail singlehanded without water ballast.

 

Well, it looks like the boat is also becoming popular in America.

It was elected Boat of the year by the magazine "sailing World" in the category of Best One-Design.

 

But alas, the Open 5.7 is a one-design (i.e. monotype), not a development class racer (despite its name).

Here is the current U.S. National Champion Classic Moth (left) next to a Classic Moth with rounder sections and less rocker. The national champ, "Mousetrap", is essencially the bow of the "Mistral" design with a stern very close to that of a Europe.

 

And here are some Classic Moth sailing photos.

 

Cudos to Mutua Madrilena, the Botin & Carkeek Transpac 52 that has prevailed recently in that class. http://www.transpac52.org/Boats/mutuamadrilena.htm

If you have Flash9 and a high speed internet connection, Botin & Carkeek has a new website for you at www.botincarkeek.com. Botin is part of the Emirates Team New Zealand design team.

 

Better use this one http://www.botincarkeek.com/home.html to avoid the long and outdated opening page.

I find this new trend of web pages from designers quite unuseful. There have become only marketing tools full with nice images but almost no technical information.

Cheers.

 

Call me stupid, but please explain.I thought effective ballast, would be just that.
At least when you lose human ballast and there is no other, the boat doesn't sail off without you.

 

I'd be interested in speaking with you about some of the old dead and dying quarter tonners, if this is an appropriate forum.

Art

 

For anyone interested, photos of the launch of my Classic Moth can be found in my gallery.
http://www.boatdesign.net/gallery/showgallery.php/cat/500/ppuser/38

My location seems to have a profound effect on trim! I sit farther forward when singlehanding.