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Brookes & Gatehouse Ltd. 
Premier Way, Abbey Park 
Romsey, Hampshire, 
England 
Tel: +44 (0)1794 518448  
Fax: +44 (0)1794 518077 
www.BandG.com

 

 

 

X-35 Performance Guide 

 

    March 2008 

 

 

 

 

 

Prepared by: 
 
Nat Ives  

 

Содержание X-35

Страница 1: ...Brookes Gatehouse Ltd Premier Way Abbey Park Romsey Hampshire England Tel 44 0 1794 518448 Fax 44 0 1794 518077 www BandG com X 35 Performance Guide March 2008 Prepared by Nat Ives ...

Страница 2: ...the compass An offset is then entered to account for the alignment of the compass as installed on the yacht 1 Autoswing NAVIGATE COMP CAL CALBRATE START Prior to commencing the swing ensure that no magnetic or large metallic objects are placed near to the compass Choose a calm open stretch of water and then begin the calibration process as outlined in the User Manual ensuring you steer a steady ci...

Страница 3: ...above calibration by 1 will address the under reading of the log 3 42 1 3 39 If you are using the latest B G Hercules system with a heel sensor you can also adjust the speed from tack to tack and apply more correction at higher speeds in the case of the paddle wheel See the Owner s Manual for more information on this Once boatspeed has been verified as accurate it should be monitored against other...

Страница 4: ...ing through 1 If an error is seen in TRUE DIR then the following rule applies If TWD is lifting you tack to tack then TRUE W A is reading too wide half the error must be subtracted from the correction table If TWD is heading you tack to tack then TRUE W A is reading too narrow add half the error to the TRUE W A table 2 If according to the compass you are tacking through an angle different than the...

Страница 5: ...d to downwind This is most noticeable on Mast Head boats however all yachts are affected to some degree This is due to the acceleration of the airflow over the top of the mast and around the sails when sailing downwind The introduction of the Vertical Mast Head unit has gone some way to solving this however calibration may still be necessary As a rule of thumb it is safe to put a correction of 10 ...

Страница 6: ...ese and then compare actual performance against a set of target polars The image below shows a basic set of polars for the X35 stored in Deckman and their associated curves plotted alongside They are a good starting point but as you sail the boat you will most likely develop these into a set of your own specific to your sails and set up Conclusion The information above should help you get up to sp...

Страница 7: ...nd the world including all of the current AC and Volvo teams In addition to this Nat sailed as part of the crew on Cool Runnings the first X 35 to sail in the UK winning the Warsash Spring Series 2006 As a professional navigator Nat brings with him a wealth of big race experience He has competed as navigator in a wide range of yachts and events including the TP52 Breitling Med Cup Swan Cup and Max...

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