Interesting video from rctestflight showing APC RC plane props showing 100% improvement in efficiency on already very efficient propeller designs. I wonder if these would be a large improvement on the efoil props in circulation today for
3.5 m/s ~ 12.6 km/h at about 400w (I think, videos are long…)
That seems quite slow, but the world record pump foil speed pumped for 3.44 hours, covering a distance of 44.46 km, so ~12.9km/h. The interesting thing is that the power will be quite low, < 200W input from the pumping or less. New record slightly faster 54.8km/4hours = 13.7 km/hour
I wonder if these props would be interesting if the power curve was optimised for a slightly higher mid curve speed to improve the efficiency.
Is there any consideration for optimising efficiency for setups?