Milgram 



Table 3 

 Sailplan Calculations for the New York "32" 



(a) Seven-Eights Rig 



BB = 55.00 

 HI = 3.00 

 A(l) = .146 

 J(l) = .184 



CH = 24.80 

 CL = 2.000 

 A(2) = .029 

 J(2) = .074 



JBB = 47.50 



JCL = 2.000 



A(3) = 0. 



J(3) = 0. 



JCH = 26.70 



A(4) = 0. 

 J(4) = 0. 



HH = 6.00 



Forces and Coefficients — Boat speed = 7.03 knots 



Jib 



Main 



Total 



.967 



1.128 



.947 



NOTES: 



The following have their respective indicated value the same throughout 



Table 3: 



/3, the angle between wind and course = .740; 0, the momentum 

 thickness = .300; VV, the windspeed = 18.00 ft/sec; KK, the wind 

 gradient = .10 ft/sec/ft; VB, the approximate boat speed = 11.00 

 ft/sec; MM, the JMM ratio of the 2nd to 1st circulation series 

 coefficients = .200; MMM, the same as for JMMM, but for 4th 

 coefficients = 0; JMM = .400; JMMM = 0; CR and CRL = 0. 



The following symbols, included in the tables, are defined as: 



BB = the main span; CH = boom length (for finding area only); 

 JBB = jib span; JCH = jib foot length (for finding area only); 

 HH = distance from main foot to image plane; HI = distance 

 from mainsail foot to jib foot; A's and J's = circulation series 

 coefficients. 



The heeling moments and coefficients are about the jibtack. Nondimen- 

 sional length is from jibtack to midspan of jib for jib column, and to mid- 

 span of main for main and total columns. 



All forces are in pounds and all computed coefficients are based on the 

 apparent wind at the midspan of the mainsail. The nominal input coeffi- 

 cients CL and JCL are based on the true wind. 



(Table continues) 



1412 



