If I screw up the entry, or, especially with GP1 before I sharpened and rolled the edges a bit more, I both feel and hear the cavitation through at least the first half of the stroke. Boy does it feel ugly. The noise GP2 makes upon exit is different than that and it's so smooth throughout the whole stroke I don't think it's air, unless it's tiny amounts much smaller than I'm used to?
Perhaps not enough curve along the blade at the tip, or I'm releasing too late in the stroke (short arse with a longer than used-to paddle maybe gives me too flat an exit angle without compensating with more curve at the tips)?
This is what I am getting such a kick out of - trying to solve these GP riddles/mysteries/enigmas.
One of the next crazy ideas I have is to either start with a much thicker paddle and exaggerate the longitudinal curve and see what that does - whether it will have an impact similar to the bow I laminated into GP1- or laminate the rocker/curve into a thin-ish paddle.
As to speed, I haven't a clue sorry. Against mid-tide at Mangawhai estuary it slows but certainly doesn't halt comfortable forward progress. Is there a GPS app for the phone that you guys can recommend please that I can take with me on a speed run at slack water and finally work out how feeble my paddling is?
Thanks for that suggestion on the location of the paddles. Out of the way but easy to get to.
You mentioned a while back using epiglue. Any reason why that and not just plain Jane epoxy resin? Is there something about the week long cure time that suits a GP better? i haven't had any probs with epoxy resin...yet. i realise epiglue is epoxy anyway but just wondering what the distinctions are in respect of GP's.
Another thing about these, my first cedar paddles, is they suck up oil (I'm using linseed) way more than native timbers I'm more used to. Does anyone use a film-forming first or second coat to seal it before finishing with oil? Or is that asking for trouble down the line?
The main trouble with GP2 is it paddles the best of the three and now I'm even more paranoid about shaping the loom to get it right. Might use GP3 as the test bed for that and save GP2 from death by a thousand plane cuts.