Search found 28 matches

by Karl Wittnebel
Thu Sep 21, 2006 6:07 am
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

Others may disagree but particularly when learning to sail the IC in breeze it is handy to be able to take the main down. In event of tiller extension failure, for example, it becomes impossible to sail the boat with the main up in breeze, but it is perfectly possible to limp back under jib alone, e...
by Karl Wittnebel
Sun Sep 10, 2006 5:03 pm
Forum: Latest Developments
Topic: Wonk report ?
Replies: 16
Views: 17389

Steve how do you feel about the rocker profile of Wonk? Just curious. Andy seems to favor the straighter line, while Lust Puppet has the chines sucked up aft which makes for attractive trim on reaches when the seat is aft - bow stays up in the air where it belongs. Amazing how she slows down at high...
by Karl Wittnebel
Thu Sep 07, 2006 4:09 am
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

Phil -

Your writeup on building the DC is excellent. Thanks for taking the time to explain how you built your boat - it is a service to those of us interested in building similar craft.

Rgds,
Karl
by Karl Wittnebel
Thu Sep 07, 2006 4:03 am
Forum: Latest Developments
Topic: 1 Class 1 Course
Replies: 18
Views: 20283

(this is an excerpt from an email sent to the ICF sailing committee in response to the suggestion that IC, AC and DC should sail separate races, possibly on differing courses, at the upcoming Worlds). _____________________________________________________ I'm not on the committe and I think the commi...
by Karl Wittnebel
Tue Jun 27, 2006 5:41 pm
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

All I know is that when you are hooning along upwind and the rudder breaks off you don't go straight anymore. Lots of ICs are set up with neutral rudder post position so you can pretty much let go of the tiller on the fly, but the thing is still surprisingly loaded up. I was off the end of the seat ...
by Karl Wittnebel
Mon Jun 26, 2006 4:01 pm
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

Red Shift story proves point: can't get upwind without something generating lift in the stern, bungified or whatever. Tall rudders work, but are less practical, particularly down here in the Chesapeake with our shallow water. Just depends what you want to put up with in terms of launch/recovery proc...
by Karl Wittnebel
Mon Jun 26, 2006 3:48 pm
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Steve Clark</i> <br />Well, when Oliver broke the shaft in RedShifts rudder, he sailed 4 miles upwind in force 4-5 with the rudder blade stuffed in the sl...
by Karl Wittnebel
Fri Jun 16, 2006 8:16 pm
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

In current IC rig configuration the rudder is highly loaded going upwind. I have sheared two of them off for structural reasons and the boat is unsailable - rounds up immediately and capsizes. So it is generating a fair amount of lift back there. Some people seem to think this is a better idea than ...
by Karl Wittnebel
Fri Jun 16, 2006 8:09 pm
Forum: Latest Developments
Topic: Final Rule Changes
Replies: 34
Views: 31728

In my view the rule should permit outriggers and limit them to max beam. Applying the fair curve rule to the rig seems daft.
by Karl Wittnebel
Fri Jun 02, 2006 3:31 am
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

Hi Phil - The arced foredecks on current ICs never were very efficient at shedding water. In that sense, a higher, skinnier foredeck is probably much better. But you also have to tack the thing, and if there is too much freeboard up there it tends to get blown off the wind a bit. So a powerful rudde...
by Karl Wittnebel
Thu Jun 01, 2006 9:49 am
Forum: How to......
Topic: seat carrage runners
Replies: 2
Views: 6156

Over here (USA) there are a few different systems in use. In the Chesapeake we use 1/2" aluminum c-channel, oversize holes through the top surface and countersunk holes in the bottom for screws. This gives you access for putting the screws in. Typically a plate of G10 is glued on the underside of th...
by Karl Wittnebel
Thu Jun 01, 2006 9:32 am
Forum: Latest Developments
Topic: Designing to Steve Clark's proposed new rules
Replies: 180
Views: 133967

Looks great, Phil! Inspiring to say the least.

You may wish to get the Cg lower on the aft deck (i.e. lower the deck a bit), as I don't think you'll be sinking as much as on the Moth, and it would seem more stable in the corners.

Keep posting!

Karl
by Karl Wittnebel
Tue May 23, 2006 3:29 pm
Forum: Latest Developments
Topic: Formula Canoe
Replies: 4
Views: 7348

I like the idea of everyone on one course. It brings everything together again. They may have done the Europa Cup like this in the past, though I'm not sure if they used separate starts or not. As for the handicap thing, I'm not sure we have enough numbers to make it meaningful, so I'll defer commen...
by Karl Wittnebel
Fri May 05, 2006 2:35 pm
Forum: Latest Developments
Topic: Weight.
Replies: 20
Views: 24920

This from Bill Beaver: Hi Karl, I believe that I could build a stich and glue boat similar to Sock Puppet that would meet a 50 kg minimum weight. Sock Puppet (an arc bottomed double chine boat built to my design by John Williamson about 5 years ago) is not a minimal boat relative to the development ...
by Karl Wittnebel
Wed May 03, 2006 10:48 am
Forum: How to......
Topic: Composite Chainplates
Replies: 6
Views: 10741

In my boat I cut the inside skin and core out,cut a g10 plate to fit the cut out section, wrapped uni from one side of the plate, up over the top edge (where there is a stainless tube of the proper ID to take a pin whose length matches the fore/aft dimension of the plate), then back down over the g1...