G'day,
Those are the ones I made and tested which formed the basis for the
new ones on Blind Date, except that BD's are liftable and wheel
steered. They do not have a hinge in the shaft. The shaft bearings
are located between the ply plates so the rudder kicks up at any
angle.
There are no rudders with the hinge in the shaft sailing yet. I have
built a set for my harriette, as has Doug for his, both of which are
very strong and work on the bench. The prototype production boat in
China also has them.
regards,
Rob
On Wed, Dec 17, 2008 at 6:47 AM, Gardner Pomper <
gardner@networknow. org> wrote:
> Hi,
>
> Thanks for posting those. I checked them out, and I had seen them before,
> but I guess I just don't understand what I am looking at. It basically just
> looks like there is a piece of
plywood next to the rudder on each side. I
> don't see a pivot pin or anything and I don't see how the rudder would kick
> up unless it was pointed exactly straight ahead. What am I missing? Is it
> really just a traditional external type rudder sandwiched between 2 plates?
> - Gardner
>
> On Tue, Dec 16, 2008 at 4:12 PM, Mike Crawford <
jmichael@gwi. net> wrote:
>>
>> Rob's latest designs, to the best of my knowledge, are on the group
>> files section in "Rough beam rudders & fea of rudder supports" and are also
>> briefly mentioned in the latest newsletter at
>>
http://www.harrypro a.com/newsletter 0608.htm . Keep in mind that the photos
>> of the rudder are a rough mock-up made for testing, and are not
meant to be
>> a final design.
>>
>> If the stock were lengthened, it could allow for raising and lowering.
>> As it is, it should allow for kicking up in either direction. Best of all,
>> it's relatively simple, and the difficult design and testing are already
>> underway (well, at least the design and analysis).
>>
>> It will be interesting to see the final version that gets installed on
>> Blind Date.
>>
>> - Mike
>>
>>
>> Gardner Pomper wrote:
>>
>> I am completely in agreement on not building anything right away. I mostly
>> post my layouts and especially the rudder designs to get feedback exactly
>> like this. I would really, really, really love to see drawings of the latest
>> thinking in rudder design. Mike, it sounds like you have seen Rob's latest?
>> Is it posted in
the forums somewhere and I just haven't noticed?
>>
>> My basic question is how to combine lifting and kickup while also
>> providing wheel steering. The drawing currently posted tries to provide
>> that, but has that hinge below the support struts. The one I posted before
>> allowed for a solid shaft, and would raise and kick up with break-aways at
>> the beam and at an upper support, for kicking up in different directions,
>> but it would swing out and I don't know how to attach a quadrant to it.
>> If there is a better design, I would love to just start including it in my
>> layout drawings, just so that I get a feel on the space and attachments
>> required.
>> I will shortly be posting an idea I had for folding beams, to go along
>> with some of my layouts. It is a refinement of the idea of a pivoting beam
>> supported under the ww
bridgedeck. I will be hoping to get feedback on this
>> too. It seems like the rudders and some sort of folding mechanism are the
>> main things that still need some development on the Harry's and I am excited
>> to be part of that, even if I just drive discussion by posting bad ideas
>> <grin>.
>> Thanks for all the comments. I am constantly learning.
>> - Gardner
>>
>
>
