- V impressive set up. ABout 1.4m moment arm when fully down which is fairly large but the boat is so light compared with other boats of the same length, so the loads would not be excessive compared with a transom hung rudder of a boat 2-3 times the displacement. Especially as the full depth is mainly needed when beating in light winds.
This depth when fully retracted leaves still about 300mm under the hull. How easy is it to remove the fuse and kick up the rudders when beaching? -- In harryproa@yahoogrou
>
> Hi George,
>
> All the way down the rudders draw 1.5 m.
> They can be retracted to 0.7 m.
>
> regards
> Rudolf
>
> ----- Original Message -----
> From: George Kuck
> To: harryproa@yahoogrou
> Sent: Sunday, July 12, 2009 6:40 PM
> Subject: Re: [harryproa] BD photo upload
>
>
>
>
>
> Hello Rudolf,
>
> Can the new rudders be retracted at all or are they at a fixed depth ? How much draft will you have with rudders installed ?
>
> Happy sailing,
> George Kuck
>
> --- On Sun, 7/12/09, Rudolf vd Brug <rpvdb@...> wrote:
>
>
> From: Rudolf vd Brug <rpvdb@...>
> Subject: Re: [harryproa] BD photo upload
> To: harryproa@yahoogrou
> Date: Sunday, July 12, 2009, 11:06 AM
>
>
> Hi Doug,
>
> The blocks are UHMPE plastic with 153mm holes machined for self aligning Jefa rudder bearings.
> I suppose rudders this size get stuck at higher speed when a tube bearing would be used.
> On the original rudders we noticed lots of parts twisting and bending, and steering got sticky.
> regards,
> Rudolf
>
>
>
> ----- Original Message -----
> From: Doug Haines
> To: harryproa@yahoogrou ps.com.au
> Sent: Sunday, July 12, 2009 12:12 PM
> Subject: Re: [harryproa] BD photo upload
>
>
> hey rudy,
>
> thanks yeah i see it now, that's good.
> what is the plastic? solid slippery smooth plastic machined or just drilled by drill press?
> the smaller boats would simply bear directly to the tubein which is the top of the shaft.
> Or is there no tube because it could bear shaft to plastic block.
> Well as usual, my bearings are tight and stuck mast , so bit more work there.
>
> See
> Doug
>
> --- On Sun, 12/7/09, Rudolf vd Brug <rpvdb@freeler. nl> wrote:
>
>
> From: Rudolf vd Brug <rpvdb@freeler. nl>
> Subject: Re: [harryproa] BD photo upload
> To: harryproa@yahoogrou ps.com.au
> Date: Sunday, 12 July, 2009, 7:34 PM
>
>
> Hi,
>
> If you mean the space between the cheeks of the rudder box,
> that is where the black plastic blocks holding the bearings go (see last photo).
> Through the cheeks and the bearing blocks a sheer pin is holding things in place.
> So there are two sheer pins taking turns acting as pivot or sheer pin depending on the direction of the boat.
>
> regards,
> Rudolf
> ----- Original Message -----
> From: Doug Haines
> To: harryproa@yahoogrou ps.com.au
> Sent: Sunday, July 12, 2009 2:59 AM
> Subject: Re: [harryproa] BD photo upload
>
>
> how can that slot be so wide?
>
> --- On Sun, 12/7/09, Rudolf vd Brug <rpvdb@freeler. nl> wrote:
>
>
> From: Rudolf vd Brug <rpvdb@freeler. nl>
> Subject: Re: [harryproa] BD photo upload
> To: harryproa@yahoogrou ps.com.au
> Date: Sunday, 12 July, 2009, 7:45 AM
>
>
> Hi George,
>
> I never found the 270 degree rotation limiting.
> With the original design you could see the rudders very well, so it was hard not to notice which way to turn in a shunt.
> On Arttu's boat with in-hull rudders I screwed up when I 'shunted' under engine power.
> Only the rudder shaft is visible there, and dispite the fact there is a clear mark showing the front of the rudder I managed to
> turn one rudder the wrong way. But I must say that this wouldn't be a decisive matter for me in choosing a type of rudder.
> You can get used to lots of things and shunting does take some time to become a natural action.
>
> Hopefully we will get BD in the water by August and see how these new rudders work.
> Regards,
> Rudolf
> ----- Original Message -----
> From: George Kuck
> To: harryproa@yahoogrou ps.com.au
> Sent: Saturday, July 11, 2009 10:28 PM
> Subject: Re: [harryproa] BD photo upload
>
>
> Hello Rudolf.
>
> Was the limited rotation of the original rudders a problem and did it contribute to your decision to go to the new design ? Do you get used to the 270 degree rotation or is it something you have to remember to rotate ruder in correct direction each time you shunt ?
>
> How soon do you expect to complete the new rudder system and get boat back in watter for testing ?
>
> Any additional pictures you post as progress continues will be greatly appreciated.
>
> Good luck with your project and Happy sailing,
>
> George Kuck
> Chestertown, Md.
>
> --- On Sat, 7/11/09, rpvdb@ymail. com <rpvdb@freeler. nl> wrote:
>
>
> From: rpvdb@ymail. com <rpvdb@freeler. nl>
> Subject: [harryproa] BD photo upload
> To: harryproa@yahoogrou ps.com.au
> Date: Saturday, July 11, 2009, 6:12 AM
>
>
> Hi,
> In the photo section some pics of the new rudders for BD.
>
> regards,
> Rudolf
>
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