Got my head around the rudders. Nice. This system should eliminate
the need for raking the foils but still allowing it if it seems
appropriate. I can see why the initial ones broke. There is a high
ratio of moments, but probably not more than 50% more than on a
Hobie 16 rudder system.
Good one,
Robert



--- In harryproa@..., "Rob Denney" <proa@i...> wrote:
> G'day,
>
> Following is in reply to a question from Robert about the new
rudders. Attempts to reply to his email address have failed.
>
>
> G'day,
> Should be some pictures on the next web update. Version one broke,
version
> 2 is being built by the Belgians.
>
> They steer the boat well, according to Mark who was test pilot. Not
> surprising, as the hull mounted ones are more than adequate, and I
reckon I
> could steer with the sails alone if required.
>
> Loads on shafts are higher, but these are easy to beef up. Loads on
> bearings are also higher (only 300mm apart), but again, easy to
beef up, and
> because it is all on the beam, the additional laminate is not much
more
> area, so weight stays low. Far less likely to get damaged than the
hanging
> off the side variety. Mark 1 was removable, mk 2 will be fixed to
the beam,
> making strength less of an issue.
>
> Regards,
>
> Rob