I was referring to this video: (look at the 2nd part with spi)But start to realize that these might be km's/h?

http://www.youtube.com/watch?v=JKHgygcfuGU&feature=youtube_gdata_player

Another way of looking at this is, is doing math. When you look at the record round of the Round of Texel race (aprox 100 km), it is done by Herbert Dercksen en Mark Bulkeley in 2 hours, 7 minutes and 7 seconds. That means an average of around 27 knots! Or I need to go back to school, and learn to do math again :-)But this is probebly done by an F20

This years winners were:

1
186
formule 18 Spi
Zeekant, Oscar
NL
Begemann, Karel
NL
J
2:46:50

This is still an average of almost 20 knots, but done with an F18 in bad circumstances.

So the conclusion is that an Infusion tops around 22-23 knots? (and the Inter probably peaks at 19-20 knots?)