Last I checked the distance measurement on the logger was based off the motor spinning. For efoil that doesn’t work very well. Ideally, what I’d like is calculated Wh/mi (or km) vs logged GPS.
So I can look back and check see that when I was traveling 12mph I was getting about 60Wh/mi and when I was going 20mph I was getting 120Wh/mi.
Or I can go in an change foils/props (on the same battery) and see what kind of efficiency I get.
Something like this metr log I grabbed from here: Sep 22, 2019 - metr.at | UfSgd (Metr app records GPS data together with VESC data - #26 by V_S)
Looking at the consumption line:
Let me download my log from yesterday and see how it looks.