I like this video. It is taken from a NACRA 5.5 18SQ of a Prindle.

http://youtu.be/vlqAVoHpP9o

Hi Every one , im steve from australia .I have sailed a hobie 18 for years but recently bought a nacra 18 sq ,Im trying to find as much info on the class and also the F 18 boats , so i have read the last few posts and found youre info really interesting ,, i also wanted to make some improvements to this boats performance ,, by using a F18 sq top main , jib ,,and a symect s pinn , Similar to a f 18 or 5.8 nacra set up ,,, Have any one seen this done ,,?? what type of issues will this bring ,, Any idears also of where to obtain the F18 sail plans and measurements ?? I would appriciate any help or advice greatly ,,Thanks

Steve

i just put a used n6.0 on my 18sq. i'm pretty sure it's over 18sq but it sure spead up the boat. there's a pic in a back thread nacra 18sq. good luck