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Topic: Sail Measurement |
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ifoxwell |
Posted: 28-Jun-05 09:59 |
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Any one got the official dimensions for a Buzz Jib?
Ive bought some new sails and the new one is significantly smaller than the old, about three inchs off of the leech, although the tack, clue and head are in the same place
Sobstadt are wondering if its my old one over size or the new one under so it would help if i knew what the right size is.
I trust we have a measurement some where other wise, if this is the new cut, everyone with old sails will be at a big advantage!!!
Ian
965 |
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John Paul Indoe |
Posted: 28-Jun-05 18:34 |
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on the wet and windy site, the jib size is said to be 4m square |
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Chris H Buzz1040 |
Posted: 28-Jun-05 22:37 |
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There's no measurements as such, I assumne they are controlled by Topper/Sobstad. It's not a good state of affairs and adds to other comment about consistency between the old UK made sails and the new ones from the Far East. May worth a mention to Bob Ladell or Andy Holmes for starters.
Chris H |
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Bob Ladell |
Posted: 28-Jun-05 23:06 |
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I haven't seen any dimensions for any of the boats other than the overall high level specs and the detailed rope and block diameters for the ISO.
Scattered around the fleet we do have a range of all sails of all vintages so if we want to take actual measurements and compare we could.
Bob |
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ifoxwell |
Posted: 29-Jun-05 09:18 |
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Stuart 1027 popped around last night and we confirmed that it is indeed undersize, and is actually the same shape as a jib he bought as a second direct from sobstad (apparently cut incorrectly!)
I'm sure it will get sorted but if your buying new sails worth a check. Its obviously different if you know what the jib is meant to look like, not so easy if your a beginner or a new comer to the class!
Ian
965 |
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Pete Lindley |
Posted: 29-Jun-05 12:57 |
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How about measuring the lengths of the edges, and the angles of each corner?
Don't measure the luff wire as it is ok for this to be slightly out.
Pete |
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ifoxwell |
Posted: 29-Jun-05 16:10 |
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ummm well all three fixed points are in the correct place. The difference is that the leech curves in not out, if that makes any sense.
Measurement would need readings taken at various lengths down one edge
Ian
965 |
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Bob Ladell |
Posted: 29-Jun-05 18:53 |
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General message to all Classes. If we have the clear evidence, backed with photos, we can take it back to Topper and the manufacturer concerned. Sobstad in this example.
We're supposed to have one designs - not multiple designs at the whim of whoever gets assigned to make the item of the day.
Need the info sent in to your respective Committee folks asap - and then consistently through the year. That way you help us help you - giving the Class Associations real teeth and value added back to the members.
Bob |
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paolomoncia |
Posted: 30-Jun-05 08:54 |
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Last Year I noticed Sobstadt had two Buzz jibs at a discount price. I asked more details, and they told me the reason of the offer was they were smaller than normal. Maybe those have been sold as normal ones by mistake, but I guess it is worth checking if there is a measure problem with new sails at Sobstadt.
Cheers
Paolo |
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John Paul Indoe |
Posted: 30-Jun-05 19:11 |
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the main which i got a year ago, ive now got it out to start racing with it, and its bigger that the old one and this makes it difficult to put in the cunningham
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ifoxwell |
Posted: 30-Jun-05 21:59 |
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I should point out that Sobstad are being as helpfull about this as they can, and Ive been told that I can use this jib while I wait for a correct one.
My main was slightly bigger as well, but its only because the old one has shrunk!! Point to note if you have old sails 
Ian
965 |
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Richard 828 |
Posted: 01-Jul-05 08:24 |
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I have an old (pink stripe) ISO main which is still useable, and it's inches bigger than the newer one, it can't be fully flattened because of the foot length, clew position about 2 inches further along the boom. It doesn't seem to have shrunk.
It should be possible to lay some sails on top of each other in Garda in the big tent to get a clearer picture of how evolution has occurred from pink to purple to black stripes, and from UK to China manufacture.
What about spinnakers? much more difficult to compare because of much greater 3-D form.
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SpellerMike |
Posted: 01-Jul-05 16:13 |
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A word of caution when trying to measure sails by laying one on top of another (ask any sailmaker).. because of bolt rope shrinkage and edge tape stretch sails must be tensioned to get a relative measurement.
The ISOs weht through this exercise about 5-8 years ago with no real conclusion we (the Technical committee at the time) even witnessed the manufacture of the Genesis sails at Sobstad (no we didn't have to travel to China.. Now there's a thought..) Be cautious with any conclusions you come up with.. |
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Bob Ladell |
Posted: 01-Jul-05 22:15 |
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Good advice. OK Maestro - so what's the correct technique to achieve a realistic comparison ??
I think the questions around sails on ISO and Buzz in particular are simply due to the unknown. Sobstad have mad some changes over the years, probably for good reason and as far as my limited knowledge of these things goes - to good effect, but just not communicated anything out us lot paying the bills. And yes, we have asked both directly and through Topper and John Caig - but no info forthcoming.
An intriguing topic - bit like the Hot Rodders wanting to know if they have a Dodge or a Chevvy under the hood and the degree of nitro injection. |
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