I have been looking through old emails trying to find specs on the Blind Date rudders. I found the sizes for the old ones (0.5m by 1.5m) and the new ones that were replaced with beefed up old ones (0.47m by 1.5m), but I haven't been able to find the relative positions. I know the "new" ones were on the beam, and the old ones on the hull, but I haven't been able to get the actuals positions. By measuring the rendering of Blind Date on the harryproa web site, I *think* that the old rudders were about 2.8m back from the bows, and the beams were 5.2m back from the bows, but those are wild estimates.
Based on those numbers, it would seem like the rudders really need to be closer to the ends than the beams. The guesses I come up with is the rudders should be within 20% of the lw hull length of the ends. The beams on harryproas generally seem to be nearly twice that far back.
Does this all seem like it is an accurate analysis? If we go for beam mounted rudders, then the beams need to be moved towards the bows?
- Gardner
On Thu, Sep 15, 2011 at 8:21 PM, Rob Denney <harryproa@gmail.com> wrote:
On Wed, Sep 14, 2011 at 3:21 PM, Doug Haines <doha720@yahoo.co.uk> wrote:
>
> What's going on here Rob. Can't anyone else get a single aft rudder to go right?> The pictures on Sol look vastly improved as a way to raise and lower.> now.org> wrote:
> >
It took me a while to get a single rudder working on El. Definitely
something to try on the bigger ones. First off the wind, where the
difference in speed and bow attitude was really noticable on El.
> >
Nol,
Agree about 2 rudders for maneuvering, etc being really handy.
Something else to video is crabbing sideways off the jetty when the
wind is blowing you onto it, and see how sharp the boat will turn
under power.
Carlos,
Pretty easy to do, but the loads when the rudders are up get very large.
rob
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