# Foil pumping using low power efoil

**URL:** https://foil.zone/t/foil-pumping-using-low-power-efoil/13171
**Category:** Riding
**Created:** [July 21, 2021, 12:59pm UTC](https://foil.zone/t/foil-pumping-using-low-power-efoil/13171 "2021-07-21T12:59:21Z")
**Posts on this page:** 1
**Showing post:** 9

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### Author: ![mterea](https://foil.zone/letter_avatar_proxy/v4/letter/m/919ad9/32.png) [@mterea](https://foil.zone/u/mterea)
#### Post date: [July 13, 2024, 9:48am UTC](https://foil.zone/t/foil-pumping-using-low-power-efoil/13171/9 "2024-07-13T09:48:26Z")

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[![](https://img.youtube.com/vi/kyjCwyfnrU8/maxresdefault.jpg "Propeller Design Competition Ep. 3 - Best Propeller Revealed") ](https://www.youtube.com/watch?v=kyjCwyfnrU8&t=969)

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

 ![CleanShot 2024-07-13 at 10.30.43](https://foil.zone/uploads/default/original/3X/f/a/fafdb33f2a5bc39ee032fd71a0cbcf107d42aa45.jpeg)

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](https://www.youtube.com/watch?v=dLlan3GempY) 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](https://www.totalsup.com/news/nicolas-iten-pump-foiling-records-indiana-paddle-and-surf-condor-xl-wing/) 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?

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