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Changes at SCHRS

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Post Options Post Options   Quote SX-ed up Quote  Post ReplyReply Direct Link To This Post Topic: Changes at SCHRS
    Posted: 22 Jun 06 at 4:25pm

I take the point about encouraging racks, my worry about using overall beam is if we assume the pivot point is the downwind board (plate, skeg) then boats with wider hulls, for example a shearwater, have a narrower effective beam. You then need to get more complex by using the waterline beam for the boats righting moment and the total beam (or distance from the downwind board to the trapeze 'artists' feet i.e. (total beam + waterline beam)/2 ) for the crews righting moment.

It's all a bit fanciful anyway as most boats are designed to be powered up in a similar wind range, with the sail area dictated by righting moment and the SCHRS already goes to great lengths to calculate sail area.

One good thing though, if boats start to get narrower because beam costs on handicap then perhaps I can forget the diet   as a couple of extra stone on the wire will come in handy.

Steve

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Post Options Post Options   Quote tornado435 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 06 at 6:16pm

You and me both Steve.

More sail, less righting moment might give me a chance without having to eat lettuce for the rest of my life 

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Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 06 at 8:38pm

Racks will be included in the calc of "beam" to get a "righting moment"

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Post Options Post Options   Quote tornado435 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 06 at 9:18am
Will the carbon mast penalty ever be brought back?? Taken out to keep the Nacra 20 boys happy!!
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Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 06 at 9:45am

Originally posted by tornado435

Will the carbon mast penalty ever be brought back?? Taken out to keep the Nacra 20 boys happy!!

 

I very much doubt it. 

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Post Options Post Options   Quote Jalani Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 06 at 10:37am
Originally posted by Scooby_simon

Originally posted by tornado435

Will the carbon mast penalty ever be brought back?? Taken out to keep the Nacra 20 boys happy!!

 

I very much doubt it. 

The point about the CMP was that it had no real sound basis for being imposed. Just a gut feeling on someone's part that a lighter mast should be a performance gain.....

In practice it seems that any gain is too small to be measured and rated consistently.

Far too old to still be doing this......

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Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 06 at 11:06am
Originally posted by Jalani

Originally posted by Scooby_simon

Originally posted by tornado435

Will the carbon mast penalty ever be brought back?? Taken out to keep the Nacra 20 boys happy!!

 

I very much doubt it. 

The point about the CMP was that it had no real sound basis for being imposed. Just a gut feeling on someone's part that a lighter mast should be a performance gain.....

In practice it seems that any gain is too small to be measured and rated consistently.

 

There must be some gain with "less Kg up top", but as you say it was difficult to "prove" and so it was just a "gut feeling mod". 

With all these things there are a number of options we could do, however (my opinion for now) is that we need macro fix(s) to the rule quickly and then (if there is a need) we can look at minor tweaks later.

For example we could consider adding the weight of the mast as a parameter, not just the overall weight of the boat.  I repeat COULD.

If there is sound science (and measurable within the rule) then we may consider it.

(how amy "may's" and "could" can I get in one post

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Post Options Post Options   Quote 353rob Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jun 06 at 11:46am
I have a lot of faith in that the new updates to beam RM and maybe the blade area's V aspect ratio will solve the major holes in SCHRS. It will be interesting to see how the public react to the changes, for example take the H5.9 standard and the Spitfire, what will happen if the H5.9 goes up a few points because of the narrow beam and the Spitfire now is on the wrong side of the rounding up of the numbers and drops a few points, will they be protest and calling foul?
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Post Options Post Options   Quote hurricane Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jun 06 at 1:21pm
that would annoy the spitfire boys as the boat has always rated so well as it was designed for the rules
lifes to short to sail slow boats!

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Post Options Post Options   Quote tornado435 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jun 06 at 1:23pm

Luckily I've still got my standard Hurricane. Maybe I'll use that for Handicap rather than the Tornado

People will always moan about Handicaps and you can't please everybody all of the time.

As long as the mods are transparant and there can be no accusation of favouritism then there can't be a problem imho.

 

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