GX Calculator

Calculation table for AT-cable, length and maximum sail space of a Top-Down Gennaker on a GX furler. 

 

Model GX model: AT-cable length (mm) Max sail space (mm)
ID Total distance between the halyard shackle and the attachment in the deck / bowsprit
SD Standard deduction (recommended): - 100 - 100
HS Deduction for halyard swivel - 70  
LS Deduction for lower swivel - 100  
  Any other deductions such as 2:1 bridle below lower swivel and / or 2:1 halyard system - -
ATS Max space for the AT-cable = -270  
% Deduction (1%) for the elongation of the AT-cable = ATS x 0.01 - -3 -3
SDH Deduction for halyard swivel   - 70
SDL Deduction for lower swivel   - 100
CRL

Cover length of the AT-cable

NOTE! This is NOT the cutting length!

 = -267  
B Addition for Line-lock terminal (halyard swivel) + 120  
A Addition for Line-lock terminal (lower swivel) + 120  
ATL AT-cable total length (cutting length) = -27  
MSS Max sail space (including space for lashing)   = -267

 

 Control measurement of assembled system Total system length
TL

Total system length (SDL + MSS + SDH):

 -97 mm