The Front wing have I found by Bic. Is not handmade.
I have no 80kg Drivers, my family are all lightweight 
But we have not - 3 and +3,
We used +2 and 0. 
Thanks for the infos,
I have also out runners 80, 63 they perform very well but direct drive inrunner gave about 5-10% more efficiency
I buy 5 for a
Is only comparable if the same prop was used.
But don’t worry, because my own outrunner will be ready shortly.
Greetings Frank
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If this front wing is the one from the Bic Techno windfoil 230 (82cm span) , it has been measured at 31.3knots = 58kmh. Food for thought.
May I ask how much it is sold separately ?
Are you going to make several of them ?
Of course we have tested with same exact setups, wings foils etc even same vescs we tested maybe 15 motors also for 3 years
Overall they are all in the same range except 80 outrunner that waste a bit more due to the drag of rotating part and diameter.
We built our own inrunner and we love the silence and efficiency, but the con is the weight.
Outrunner are nice for cost reason and simplicity, but the con are finding right bearings for salt water and the ability to add a duct. Also we won’t achieve same efficiency with outrunner. Our motor efficiency is 92% at 2kw
Our first efoil was made with a 6374 motor and worked great 
How is the 92% heard / calculated?
Test bench, eddy current brake or foil.
A value that seems too good.
I had already developed RC Heli Motoren Outrunner for Torcman (today Torqueedo) in 2005 or 2006 … With 88% Eta I’m operating range.
Greetings Frank
It called the Bic Kerfoil
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Simulated, but after 1 year real world testing benchs no outrunner could compete in efficiency (we started our first working efoil in 2017).
If you think the contrary i will be really glad and happy to see the logs, because outrunner are cheaper to build all the community could benefit from this.
Our inrunner motor has cleverly made distributed winding, high quality magnets inside the rotor made of high quality materials and other features. And was designed by a world class electric motor engineer.
Moreover dont forget the rotating can in the outrunner.
For example :
Full throttle no load test in water at 12S :
80 outrunner (100kv) approx 300 watts, an energy waster
63 outrunner (120kv) 200watts, a good match
50 outrunner (280kv) 120 watts, difficult to use, need low pitch strong prop, fragile bearings
Direct drive inrunner 120kv as low as 60 watts to 100 wattes, depend on two or one lip seal…
Applying load would reduce RPM and the waste but that is anyway a big difference.
Regarding our inrunner, we dont know if we will commerciliaze, because production is really costly and we are afraid not to be able to reach a final product less than 700€.
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got any pics for us to see?
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I will search and post ASAP 
Diameter is 70mm length of rotor is 120mm
If we commercialize we will reduce a bit length
i have it by for 250,- Euro
greetings Frank
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i will measure the losses of the outrunner immersed times exactly, but will not be as much as yours. I close all ventilation openings, cast magnets flush, and lightly soaked the winding.
Simulated 92% with your inrunner ??? Measured on a test bench with eddy current brake would be better …
greetings Frank
Of course a real bench would be the best , but not possible at the moment…
for the outrunner the figures are with the same process of filling stator rotor, putting on a lathe to make something really smooth
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I don’t know yet, actually don’t feel like it.
First 5 pieces, for a good friend and your own needs, and then take a look.
The motors are made according to my wishes and ideas.
Short, light, propeller connection in one piece with the yoke ring, robust and if it is produced it is also inexpensive.
Greetings Frank
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Hi Frank,
looks great - would like to have one - please 
Mike
Are you using Stainless steel or aluminium for the rotor?
Both are unsuitable for magnetic inference.
Greetings Frank
Hi Mike
If there is no producer or I do nothing, I provide all the data for a cheap DIY.
Greetings Frank