David,

Moderation in all things. Note that despite its boxy shape, the AS-29

is petty close to ordinary beam and weight for its length. The overall

beam is perhaps less than average (due to having no flare), but the

waterline beam is in the ordinary range.

I think of these sharpies as being sort of like a banana, floating

'convex down.' The rocker, which has virtues Mr. Bolger talks about

with respect to flow, works with respect to stability by giving the

boat a low belly, in which to put some ballast, and high ends. In a

knockdown, the high ends move the center of buoyancey away from the

ballast, giving a high righting moment (i.e. high reserve stability).

However, this sort of stability does not give much sail carrying power

at small angles of heel.

The sail carrying power comes from hull sections with a lot of form

stability, i.e. the box cross section, which depends on having adequate

beam.

If you take a small boat, and simply build it longer with the same

beam, the resulting hull can carry more sail area in proportion to its

length, but it can not carry it higher. As the boat gets longer and

longer, the rig must stay the same height. As you go from one mast to

two or three masts (remember Rondo II?), the aerodynamic effeciency

suffers.

That's my view, anyway.

Peter

>

> I've been thinking a lot about stability and recovery, and studying

> BWAOM very hard, especially the AS29 and LooseMoose. I think I'm

> finally starting to get the shallow draft/high freeboard concept.

>