Thanks, Neonguy and Hoyt!
Porta, I think you're right - it does look that way, and you definitely get the feel of a power stroke and a pause when pedalling.
Hi Clemens! good to hear from you! I have actually put double sided pedals on - plain one sided and clips the other (you can just see the clips in some of the shots if you're quick!) but its rare that we're actually on a long run, or looking for high efficiency - just pootling round the bay here...
This was really just messing about getting to know the little waterproof camera, but the real eye opener for me is the amount of turbulence off the drive legs - it looks like more than from the hulls! I suppose to some extent they are like little tiny hulls pushed way beyond their normal hull speed and generating a load of wave resistance. I wonder if it might be worth fairing them?
I'm seriously considering a complete rebuild from scratch with some simple ply hulls, because the current build is so heavy. with the dart hulls forming keels, and the weight, its extremely difficult to pull up the beach.