L4000 / 29er ratings
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Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=696
Printed Date: 14 Aug 25 at 4:11am Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: L4000 / 29er ratings
Posted By: guytoon
Subject: L4000 / 29er ratings
Date Posted: 12 May 05 at 5:00pm
Hi,
once again during our last regatta 29er and Laser 4000 where discussing about ratings. Actually it seems that in france the 29er as an attractive rating. Laser should go faster than 29er.
Here are the coed :
RS400 : 0,7750
29er : 0,7917
Laser 4000 : 0,8083
49er : 0,9000
Could you let me know what you think of it ? Do you think 29er should go as fast Laser 4000 ? Does your ratings depends on wind speed ?
------------- Cherub 2692 "NBS"
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Replies:
Posted By: Phil eltringham
Date Posted: 12 May 05 at 5:23pm
the RYA portsmouth yardstick system does not take the wind speed into account but is an average of results across all wind ranges (in theory). The numbers are (as far as i can remember ) 906 for the 4000 and 924 for the 29er. This works out as the 29er being about 2% slower than the 4000, or 71 seconds in an hour. For all the latest numbers and the calculations used look at the RYA website: http://www.rya.org.uk/images/uploaded/15dafef7-9b94-4033-ae7b-43fef4a2ada9/Web_YR2_dinghies_list.pdf - http://www.rya.org.uk/images/uploaded/15dafef7-9b94-4033-ae7 b-43fef4a2ada9/Web_YR2_dinghies_list.pdf
------------- FLAT IS FAST!
Shifts Happen
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Posted By: Skiffman
Date Posted: 12 May 05 at 10:22pm
I think that the 29er is a fair bit quicker and at our 2 clubs our handicap has been altered to 882 from 924 which is quite a large change. There are several laser 4000 that sail there but there handicap is still 906.
I think that the laser 4000 has the potential to go as fast as a 29er but the 29er is a more demanding boat to sail and generally sailed by youths, so there is a higher quility of fleet. Not to do with the quality of sailors but mainly because we train very hard (6hours+ of land training a week and then sail everyweekend and during the summer hols).
Just what I think but then I am biased because a sail a 29er.
------------- 49er GBR5
http://www.teamfletcherandsign.co.uk - teamfletcherandsign.co.uk
Team Fletcher and Sign campaign site
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Posted By: Ian99
Date Posted: 13 May 05 at 9:27am
Originally posted by Skiffman
I think that the laser 4000 has the potential to go as fast as a 29er but the 29er is a more demanding boat to sail and generally sailed by youths, so there is a higher quility of fleet. Not to do with the quality of sailors but mainly because we train very hard (6hours+ of land training a week and then sail everyweekend and during the summer hols).
Just what I think but then I am biased because a sail a 29er.
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You've got that the wrong way round. To end up with the handicap "slower" than the boat actually is, you actually need a lot of not very good sailors in the fleet, so the "average" 29er sailor would not be as good as the "average" 4000 sailor for this to happen.
The more likely "cause" of the problem is probably that your club is somewhere where the conditions favour the 29er (I'd guess on flat water, generally fairly breezy). The 4000 leaves 29ers for dead in very light winds (it can also leave 49ers behind if they can't fill their kites ) Also in a really harsh chop the 4000 is probably quite a bit quicker as it won't get chucked around as much by the sea - something which certainly happens to the B14 and really slows you down.
All the new "skiff style" boats will get left well behind on handicap in a really big sea though by genuine seaworthy performance boats such as the 505 and Osprey though, but very few people sail handicap races in these conditions.
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Posted By: Hector
Date Posted: 13 May 05 at 11:13am
The 29er is mostly sailed by young, well trained, fit, keen, 'red hot', perfectly sized (for the boat) people.Oh yeh and Dad buys a new kite every time 'jony or mary' want one.
The 4000 is mostly sailed by older, less fit, once a month club sailors who are probably overweight and have had little or no training and for whom the 4000 is often their first asymmetric. And the new kite? - only after the new kitchen, weekend in Rome etc!
I'm suprised the handicaps aren't the other way around. 
It would be interesting to see actual speed differences with crews of equal ability. I suspect Ian99s assessment would be quite accurate.
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Posted By: Ian99
Date Posted: 13 May 05 at 11:50am
There is another factor with the 29er which I'd not thought of. The 29ers are sailed by young fit kids who generally don't give up (not sure if this is because of their enthusiasm or the fear of Daddy telling them off if they retire from a race). Therefore there will be a number of 29ers in club races (which is probably where the people just starting out in the 29er sail it first to learn how to sail it!) who actually finish on the water back with the GP14s etc. because of the large number of capsizes which are inevitable when changing from a Topper / Oppi / Cadet into a high performance boat. This will really help the handicap end up slower than it should be.
For the "once a month overweight" types, after about three capsizes in a race, the prospect of an extra pint in the club bar is better than a miserable last place finish!
Of course the 29er kids are too young to have been corrupted by the evil influence of alcohol and see the bar as somewhere where their parents sit while watching them sail and would never be tempted by the prospect of an early pint 
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Posted By: KnightMare
Date Posted: 13 May 05 at 11:58am
There is another aspect of that argument. The top 29er guys will be doin lots of training and events and wont always be sailing at the club so the numbers that will have been sent from the clubs will not include the top sailors all the time. this will make the 29er seem to be a slower boat overall.
------------- http://theramblingsofmyinnergeek.blogspot.com/
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Posted By: Stefan Lloyd
Date Posted: 13 May 05 at 12:28pm
Originally posted by Skiffman
the 29er is....generally sailed by youths, so there is a higher quility of fleet. |
Ah, the arrogance of youth.
So you expect to be getting steadily worse at sailing as you go on, do you? Might as well give up now.
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Posted By: squeek
Date Posted: 13 May 05 at 12:47pm
hey less of the daddy/parents insults. most of the 9er sailor r not quite like that.....thats more oppie/twinkie style.(not than im against them or anything )
i'm sure if you got your nat champ 9er sailor and nat champ 4000 sailor they'd both be equally skilled sailors.
when i sailed a 4000 it starts neiowmin on a reach in like 7knots much more than a 9er does (could hav been due to lack of weight for a 4000) n im sure if the wind blew its boll**ks off they'd both represent there py pretty truthfully
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Posted By: Ian99
Date Posted: 13 May 05 at 1:50pm
Originally posted by squeek
neiowmin
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Is that a special 29er word? Can you translate for everyone who doesn't sail one?
When you get a bit of real breeze* 4000s and 29ers (and pretty much everything else "modern") don't sail to their handicap as they are still on the beach with the boat tied down.
*Real Breeze is the wind range 25-35 knots when the Contender and Fireball sailors are thinking about maybe pulling a bit more cunningham on....... For proper sailing conditions, you also need waves at least 10 feet tall.
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Posted By: redback
Date Posted: 13 May 05 at 4:15pm
Actually the 4000 loves a breeze and it likes the waves. Its very happy in 25K when some of the other high performance skiffs need olympians to keep them upright. At that windspeed (in my limited experience) its also faster than an Osprey upwind and down. However I'd also say that the current handicap is about right for the 29er and the 4000. Lets face it we are only talking 2% when a good shift can be worth more than that.
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Posted By: boatshed
Date Posted: 13 May 05 at 4:58pm
Most "new" classes initially have a rating suggested by the manufacturer. Is it that favourable ratings are suggested in order to boost results and publicity ? I realise this will ultimately be ironed out but the ratings in reality vary very little year on year. The RS 800 actually became marginally slower in 2004. It races off 822 whereas the 49er with what appears to be similar vital statistics races off 747, some 10 % faster !
------------- Steve
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Posted By: JimC
Date Posted: 13 May 05 at 5:12pm
The RYA don't publish numbers until they have stats, so although manufacturers may suggest numbers the only influence that will have is if clubs doing returns agree with the estimate. I would expect that the early estimates would be a bit high because it takes a few seasons for people to find out how to rig sail the boat to best advantage.
I remember a mate who knows a bit about rigs saying that he'd boat a new xxxxx, set it up according to the book, and thought it looked dreadful, but figured he'd better try it. After a few weeks of being boatspeeded he thought "**** it", set it up how he thought it ought to be, and jumped up near the top of the club fleet. Then did some comparisons and discovered that the top of the club fleet weren't using the official settings, but ones pretty close to what he'd worked out.
So until the top of the fleet had worked out what the rig settings should be that class was probably handicapped artificially slow.
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Posted By: Phil eltringham
Date Posted: 13 May 05 at 6:34pm
The arguments about skiffs not handling breeze are in actual fact a bit pointless, they are designed to be fully powered up at far lower windspeeds that boats like the 420 or fireball, and as a result seem overpowered in 30+ knots of breeze.
As for pulling the cunningham on, its effect to flatten the main and let the upper leech blade off in the gusts actually makes the main more efficient in high winspeeds, where minimising drag created by sail camber is more important as a result of the high appearent windpeeds associated with planing to windward.
------------- FLAT IS FAST!
Shifts Happen
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Posted By: squeek
Date Posted: 13 May 05 at 6:49pm
neiowming- as in neiowm eg the sound a motor bike makes when it goes past you really fast......im not mad really
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Posted By: Wave Rider
Date Posted: 13 May 05 at 8:22pm
Yeah i dont think its fair too say all that daddy and mummy stuff about 29er sailors and the youth sailors because none of my family sail at all so all they are involved in is the dropping off and picking up. All the rest i have to do myself!
I train
I save all the possible money to keep the boat in racing condition
I have to do all the maintenance
I can never get a new sail etc by 'just asking daddy' , i have to save up for absolutely ages and do as amny jobs as possible
and all my school work haves to be done in the week so i can sail at the weekend!
So no if you talk to most of them, many youth sailors get far by not asking daddy but by working hard and have the detremination to keep gonig and do well !
------------- -[Franko]-
Chew Valley Lake Sailing Club
RS600 933
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Posted By: redback
Date Posted: 14 May 05 at 10:08am
What the modern skiff type boats do have is a modern rig. Their adjustability is a revelation (but then I used to sail a Laser). Its quite possible to make my boat feel underpowered in 20Knots and yet fully powered in 8. The hulls too contribute to the ability of the boats in high winds. Mine does drag its bum in the light stuff but the minimal rocker, and slim waterline does mean that as the wind gets stronger it just goes faster, unlike the more conventional hulls which seem to have a speed barrier which they will not exceed.
For those of you who haven't tried one consider this. You put the kite up and being a big kite they really go very fast. When you get hit by a gust you bear away and go faster still and if you get hit by another, stronger gust, you simply bear away a bit more and go even faster. It seems endless - the more wind the faster and deeper you go. The only snag is the manouevers which can be tricky since you have a narrow hull and a big rig.
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Posted By: Yann
Date Posted: 14 May 05 at 10:19am
and then the next big gust hits and you realise you dont have enough
weight to push the tiller to stop the kite collapsing from the back
because your going too low..... now THATS fun.
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Posted By: squeek
Date Posted: 14 May 05 at 11:46am
when does dat happen?? apparent wind just shift wind angel foreward
more and more and more as you go faster and faster and faster. n
when by the true wind ahgle u shud be on the other tack.... now dats
fast n fun .......well unless of coures u stack it and your helm dies
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Posted By: redback
Date Posted: 14 May 05 at 8:17pm
Yes, I'm not sure what Yann is talking about. It's certainly no problem at 30Knots true wind, I recall going down lake Garda at about a Kilometer every 2 minutes and feeling exilerated but perfectly in control. The gybes were a bit exciting, but manageable, the drops, the hoists and the tacks were a bit hit and miss though.
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Posted By: Yann
Date Posted: 14 May 05 at 8:17pm
yeah but it really doesnt happen like that, when it gets to above 25kts
ish (depending on boat) you can struggle to hold enough power to make
it accelerate enough to make the apparent wind stay forward. like a 5kt
gust hits and your boat doesnt accelerate anywhere near 5 knots so the
apparent drops back again.
my experiance of it was in 29ers and theres nothing we found to do
about it. just watch it flap once in the big gust and try to keep it
upright and get it going again. ive heard it happens most assymetrics
in enough breeze.
(im not trying to say it happens often but it certainly can do)
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Posted By: squeek
Date Posted: 14 May 05 at 11:04pm
if u can bear away down the wave ur fine....if not ur f**ked!! 9er bows are a pain in the ass thou they just dont get out the water
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Posted By: Skiffman
Date Posted: 15 May 05 at 2:05pm
It happens in most modern skiffs that don't have smaller rigs when it gets windier. The 29er's kite starts collapsing in about 25knots, its because the drag on the sails and boat stop it accelerating as Yann said so the apprent wind moves closer to the true wind angle. This is why the main loads up and then kite collapses behind the main. There is a trick to keep the kite set in 29ers but does require good teamwork as if you start doing it too much the rudder starts to cavitate from an increase in the angle of attack and the crew has to flog the kite very quickly to regain control.
------------- 49er GBR5
http://www.teamfletcherandsign.co.uk - teamfletcherandsign.co.uk
Team Fletcher and Sign campaign site
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