OK, I had missed the grandfather clause too, however, I think we need to measure all the Inter 17's in the world.....
6.1 Grandfathering of boats into the Open Formula 16 class
6.1 The head of a local Formula 16 class organisation may give dispensation (called grandfathering) to a particular design or class and allow them to become part of the Open Formula 16 class under the following conditions.
6.1.1 The design may not have hulls longer than 5,30 mtr.(17ft 4 inch.)
Looks like the UK boats rate as F16's :
http://www.nacra.co.uk/ click catamarans, Inter 17, shows length of 17 feet (5.25 mtr)
Looks Like US boats got a little longer somewhere :
http://www.nacraclass.com/F17.htm I believe my boat is 17 foot 5 long.......(LOA) but not sure what LWL is (17 foot 4 ?)
BTW Bruce, clocked my I17 at 15.7 Kts on my GPS with the kite up in not that much wind on Sunday (F3-4)
All I need is a nice F6+ (and flat water) to go and play on !
