Hi - I’ve learn’t a lot from these pages and run many searches - thanks to all the people who share their knowledge.
But I still have a question I can’t find an answer to : how do I decide what area of the main sail should be in the roach ?
I came across a small trimaran at a car boot sale and I am planning to make a smaller set of sails to hopefully help reduce pitch poling in stronger winds
Details of the trimaran http://www.rchobby.co.uk/trimaran_r...boat_fidji.html :
Length = 65 cm, Beam = 58 cm, Mast = 92 cm, AUW = 1.1 Kg
Total sail area jib + main = 387 sq in, Jib : Main sail area = 1: 2
Estimated main sail roach area (ie additional to triangle) is 24% of main sail area
The only “facts” that I have managed to glean so far are :
- the roach is about 2.5 inch on a Marblehead
- about 15% max on a 1.3 metre mast
- with a longer boom and less roach you can get better sail control and less twist as the wind picks up.
I hope one of you can help as I am keen to learn by doing - thanks in anticipation.
