mathew said...
>>>>>
, ie: maybe it is simply the flat water, but it could be something more like the wing-in-ground effect.
There definitely is a ground effect, I have a mate who paddles our estuary, he notices a marked slow down in shallow water. His theory is, ground effect throwing up a bigger bow wave, meaning he has to paddle more up hill. My understanding of planing, is that the board's sitting in front of the wave instead of behind it. So a bigger wave's giving more lift. But don't think that would equate to 10kts extra speed.
If I ever get my twin fin working, maybe I'll be brave enough to find out.