Hi

I'm thinking of increasing the rightingmoment of my ventilo F18HT for open class racing. I'm aming at a rightingmoment/sailarea between the f18 and the tornado.

I'm looking for confirmation that I'm on the right track!
So please feel free to post your opinions!

Wouter gave me some good hints and help to start with.
I'm using his formula to calculate the rightingmoment(RM) for my ventilo:
boatwidth=2.5m
boatweight=130kg
creweight=125kg
sailarea=20m^2

RM=boatweight * (boatwidth / 2) + (crewweight * (boatwidth + 1m))
RM=600 kg m

I calculated the RM for several boat's:
Ventilo F18HT=600
Ventilo F18HT with 0.5m wings=668.75
Ventilo F18HT 2.7m width=640
Ventilo F18HT 2.8m width=660
Ventilo F18HT 2.9m width=679
F18=684
Tornado=740
BIM F20=785

After that I put the RM in relation to the sailarea, (without calculating the height of the centre of effort CE)
rightingmoment/sailarea=

Ventilo F18HT=30
Ventilo F18HT with 0.5m wings=33.44
Ventilo F18HT 2.7m width=32
Ventilo F18HT 2.8m width=33
Ventilo F18HT 2.9m width=34
F18=32
Tornado=34
BIM F20=35

considering that my ventilo dosn't have a jib and a much higher sailplan, I'm thinking of increasing the width to 2.9mtr witch leads me to a relation (rightingmoment/sailarea) of 34, the same as the tornado. In this way, I guess because of the lower sailplan from the tornado, there should be still enough heeling force to sail the boat on one hull.

thanks for every post to the subject!
greetings from switzerland
Andi

Ventilo IF20 with wings (not my boat)