toni ruiz wrote:
Hi David
I am a newbie here so I apologize in advance if my questions sound a little forward...
I am very interested on your boat, but by being an amateur but graduated boat designer, I could not but notice a couple of interesting things on your design.
You cant your boards 20 degrees (I Would have though that from 12 to 15 would have been more comfortable and I could not see any pinching of the same inwards) but you do not cant your rudders.
I understand that it makes the design simpler and helps stabilize the boat while on the hard and also being rather shallow helps steer the boat, but with arrangements of this type usually you build up an asymmetrical turn on the rudders to allow for more efficient water flow ...but do you have any other reasons?
Also, the enclose fore peak but open coamings will tend to hold a certain amount of water in bad weather, I presume that you have large scuppers to flush it out?
thank you for your time, you have a beautiful design
Hi Toni,
In fact, the boards are now canted at 15 degrees, so you must be looking at an older drawing. I changed the angle to make more room for the chine logs. I haven't toed-in the board cases, as the use of Clark Y section for the boards, and resting the flat after part of that section against the cases, in itself introduces a toe-in of 2 degrees.
The rudders aren't canted in Annie's SibLim firstly to comply with the need to "Keep It Simple, Sailor!" - I didn't want to introduce UJs into the linkage, just simple fork, pin and eye joints; and secondly to make it easier to haul the boat down for scrubbing the bottom - an important part of Annie's plan, as she will be using copper/epoxy coating. I agree, it would be usual to cant the rudders, and I would encourage anyone else who builds a "SibLing" to cant them at 15 degrees.
There will be freeing ports at the aft end of the foredeck, at the bottom of the fender lockers (outboard of the board cases) and at the forward end of the cockpit. These will be big enough to accept the toe of a seaboot, to act as steps to climb up from the dinghy or a pontoon.