Mac50L wrote: ↑
Tue Mar 06, 2018 9:58 am
The lower surface to the front. As shown in the picture, and if an aircraft wing, the aircraft would be flying inverted.
Thanks. My next one should have a profile that mimics an aircraft wing. Although, perhaps I'm paddling incorrectly because there isn't much of a sweep that would bring the wing theory into play. There is some, naturally, but not much. I guess the goal is to harness as much of that as possible? I took the morning off work and went for a 5 hr paddle this morning, most of which was with GP3.1. There's not much horizontal sweep in the stroke, rather the paddle just plunges and follows a line that feels natural for me (and the width of the yak). There's also a very fine line and limit to how much I can orientate the leading edge of the blade to seek lift like an aircraft wing.
I also need to correct something I posted earlier about this GP3.1 stroke exit. I said it was smooth on both the curved and splined/bevelled faces. If I power up the splined/bevelled face, the exit isn't smooth, no matter how much I try to back the power off at the back of the stroke and gently exit the water. I think it is because the power generated (splined/bevelled face grabbing water) is so much that it loads the blade up too much for the thickness and it flexes too much, and that flex snaps back when the power comes off. It's very difficult to find that balance between as much power as possible, and still having a gradual , smooth exit. Sorry if I'm not explaining it very well. Might be one of those things people need to feel.
To follow up on an earlier point about speed. I was at about 85% effort, towing a softbait, and as far as I can work out via Google Earth, was doing 3.75 knots over a 1.5km patch on the way back. That was with GP3.1 and the gently curved blade face rather than the bevelled/splined face of the blade. I couldn't paddle it the other way around because of fears I would snap the paddle if I went too hard because that splined face loads up big time.
When I'm done learning from this paddle, I'll take it for a max effort paddle, using the bevelled/splined face and see if it snaps. I'm pretty sure it will.