Bob,
Check my math and my assumptions on what the "SP" means on the multihull tables: 72.1-.972=71.13 DPN for the FX-1 with spinnaker.
Using the FX-1 finish time of 30 minutes::
FX-1: ct=30/71.13*100=42.18
With the FX-1 sailing 30 minutes therefore the I17R must
sail the same race in 28.09 minutes (x/66.6*100=42.18)
approx. 1 minute and 54 seconds faster (30-28.09=1.91).
Is your initial impression from sailing the boat match with this difference or is there simply not enough data yet to check a comparison?
Mark MacNeil
I17R USA110
PS: Of course if you were to get an FX-1 I would expect you to concede the 1m54s (and maybe a few more) and race boat for boat!