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| VHF: Canal 77 |    | ![]() |
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#11
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Se acerca la temporada y hay que ir afinando el nuevo rating. Os paso la listita de modificaciones del ORC que me ha llegado esta tarde para 2014. Se entienden fácil y no creo necesaria su traducción ni explicaciones adicionales. No en vano es es un rating especialmente adaptado a los barcos de crucero del aficionado medio.
![]() * the default rig weight for carbon masts is now slightly higher, based on higher modulus carbon used in modern spars. This will affect only boats with an un-weighed carbon mast; * the matrix of time allowances used in the Offshore Single Number rating has changed to reflect a more realistic variation of wind speed with wind angle in offshore races; * the Dacron cloth allowance used in ORC Club now also extends to ORCi certificates; * limits and restrictions on equipment and materials were changed to be consistent with other class rules and ISAF. Accordingly, mast jack pumps are now allowed on board although not allowed for use while racing, and use of titanium or carbon in stanchions and pulpits is also now allowed; * ORC Club certificates with an unmeasured Righting Moment will have an increase of 3% to be more in line with measured boats and if their Limit of Positive Stability is below 103° the VCG figure will be further lowered until 103° is reached * further refinement of the new Hydrodynamic model, introduced last year * ratings can now be calculated for boats with double keels with bulbs and boats with canting keels together with water ballast; * the canting keel with double canard has been revised to take into account better the maximum draft at each heel angle * the upwind Aerodynamic model has been updated following a CFD study on different flying shapes that takes into account an increase of drag when depowering sails or when looking for extra drive when sails are tightly trimmed * the Aerodynamic model for masthead spinnakers was improved based on new wind tunnel data, with the maximum heel formulation also reduced while under spinnaker; * a new shaft/propeller configuration for short shafts has been introduced; * sails which have mid-girths of less than 75% (eg, jibs, genoas, Code 0's, etc) are now all measurable as headsails, with no restrictions on roach or girth size, and a new set of aero-coefficients will apply depending on how they are flown. This will not change the ratings of boats with these sails, but only offer a new approach that will now allow any type of headsail to be better rated in the ORC rating system. En cualquier caso, si alguien tiene alguna duda, que llame a las oficinas ORC en las federacions regionales que se la aclararán ![]() .Editado por enric rosello en 29-11-2013 a las 19:32. |
| 2 Cofrades agradecieron a enric rosello este mensaje: | ||
Atnem (29-11-2013) | ||
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