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Old 21st June 2011, 12:37 AM   #26
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Thumbs up Failed Engineer

What ever speed you are doing there is always some displacement into the water and therefore the rail must be in contact to some extent.IMO it appears rail is exposed but probably water has been shed away but even if it has it would be playing it part. (if it sprays off at high speed trhe momnentum exchanged would be massive)

Putting it simply board never just touches surface ; even at really high speeds (way higher than board is capable of) there would still be a channel of some description.Without it no momentum exchange can take place.
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