John said :And there is no doubt we lose out to the f18 in lighter airs due to their increased area.
<br>
<br>But on the F16HT site I've read a document that would put the F16 HT (at 105 kg, not at the minimum of 100 kg) at an advantage on wetted surface. Wouter claims this to be all important at light airs. I have copy-paste the important bit:
<br>
<br>*************************
<br>Ratio wetted surface = sq. rt. (0,77 / (5,5/ 5) ) = sq. rt. ( 0,77 / 1,1 ) = sq. rt. ( 0,7) = 0,8367 = 84 % (F16HT to F18)
<br>
<br>Ratio wetted surface = 84 %
<br>
<br>Compare to :
<br>
<br>Ratio mainsail area F16/F18 = 14,5 / 17 = 0,8529 = 85 %
<br>Ratio sail area (main + jib) F16/F18 = 18,5 / 21,15 = 0,8747 = 87 %
<br>Ratio Rated Mainsail Area F16/F18 = 12,77 / 14,80 = 0,8628 = 86 %
<br>Ratio rated sail area (main + jib) F16/F18 = 16,51 / 18,79 = 0,8787 = 88 %
<br>
<br>Genaker F16 / F18 = 17 / 21 = 0,8095 = 81 %
<br>*****************
<br>
<br>John, do you think that the given calculation is wrong ? Or can it be that the 16 footers you are referring to differ from the F16HT in this respect ?
<br>
<br>Anonimous4<br><br>