Originally Posted by hiljoball
I can only do this sailing against other IOMs.It takes sailing 20 or more meters on a single tack to see if the boat is faster/slower/ pointing higher/lower. And it will only be a small gain or loss - and it requires that the other boat has not been altered and that sailor is sailing consistently. Just not possible to do against other classes of boat as the gain/loss is usually just a small increment for each adjustment.
Thanks.. in practical terms I believe you are 100% correct.. I've occasionally checked the approximate time in my head that it takes me to hit the favored pin at the start line a few times.. but you're right .. you need to go farther say to weather or straight down wind to really tell, especially at our pond where its winds are so shifty even that varies a lot. I don't know how to measure it any way other than direct comparisons against an IOM in real time either... my problem is it's only a couple times a week i get to sail against others.. and often they are in ODOMs and Soling 50's so there's no meaningful direct comparison..
Carrying a stopwatch to time arbitrary runs to selected points seems impractical and likely ineffective too... but I hope it doesn't hurt to ask..
How these hull designers do it is a real mystery too..it must take hours of time on the water and keen observation skills to get an optimal design.