Kiwee News

Kiwee has an automatic retrieval mechanism, we use the ground gen as motor to retrieve. We have a great test bench that works well. Kiwee can retract around 120 m belt length under 2 to 5 kg pull. I shall make some videos to show you, that is really cool

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Check out our new website. Same URL : www.kitewinder.fr
And don’t forget to follow us on fb, first sailing boat kiwee test last week end www.facebook.com/kitewinder

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A nice website with detailed photos.

Everything looking smooth. Did you improve the castings?

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Yes Rod, we are slowly switching from 3D print to Resin molding. We have made an update on our extrusion machine. Mixing works better, parts are more homogeneous and we found a better colorant . all that had to the finish of parts.

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I think the product looks really nice…

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Thanks @tallakt. BTW, I am not an english native speaker , if you see something that can be improved on the writing, do not hesitate to let me know. I already made some updates @PierreB tell me about yesterday

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Much better! Congratulations! :blush:
Looking forward to that sailboat test.

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Hi all, for frenchies only, so basically me and Pierre. :grin: Kiwee will be showcasing on France 5, la quotidienne tomorrow at 11h45, almost at the beginning of the show.but I will had that to our fb stream tomorrow for our followers

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The show is still available on https://www.france.tv/france-5/direct.html, la quotidienne, 3’30" from the beginning, Tuesday October 1st (pushing the button on the screen to go to the beginning, otherwise it is live).

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Now we can use the link on the extract about Kitewinder (see the picture of Kiwee):

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Not available in Norway it seems :frowning:

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We made a first online sell today on our website. French customer. Payment has been put online 2 weeks ago. An American customer tried to get a kiwee 2 min after being online. He tried 3 times but it failed. Seems something is wrong with banks.
We are now busy on programming and electronics issues. We will evolve to v2 kiwee electronic card to have all the features needed and solve thermal issues.
Generation function seems to be the most challenging part on programming as we take into account battery level, power output, charging current + à Mppt function to maximize production.
Hard to cope with the 6 months delay we had on electronics…

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Hy, an update on kiwee dev and delivery

I decided to switch delivery to march because of soft dev. I don’t want to switch month after month and upset customers.
We will have v2 electronic card in a month hopefully. still have to send the definitive board to production then.
Software is a huge challenge but thanks to our extraordinary electronic dev Cyril, an expert in brushless and battery management, I think we will make it.
v1 board is already really promising and software take a step today. I have a first working eletric generation program and battery management. Cyril’s lybrary and architecture are powerfull and allow efficient coding.
He will continue to help us along that journey.
Prod is going well, aliminium parts, resin parts, cabling (oh my god, 120 of them) , blades ( we losse 10g of mass on each , now weighing around 90 grams).
Still some orders to be made and find finals solutions, for life line packing for example.
Life line is an option on kiwee, you can set it or not. it also allow to tune the distance between kite and blades ( with a no node solution) . We discover something really great with life line is that if you pull on it, as it is link to the cockrolsh , it turn the blades off wind and stop the system. really nice features.
Rope life duration might improve a lot than our first test on test bench. break time on test bench was about 5 days ( multiplicator factor : 60) but we recently had dampers on the test bench which is really more representative of what we see in real test. I think we will double that number at least, tell you once we made the test.
Olivier

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A 'nice article in lefigaro. French only but I guess Google can help

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Congratulations Olivier, fine coverage.

We need our French practice as well.

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A complete article for both a nice product and a promising energy way.

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Hi all, Some more news.
We have already 60 complete mechanical kiwee set ready of kiwee one . Made some small improvements again on the way like loosing one bearing in each mad pulley ( direct french translation :slight_smile: )
Still struggling with electronics. Our electronician is under the wave ( again direct translation, I like that sorry ) and still did not manage to deliver V2 version of kiwee. To accelerate dev, I debug the card by myself last month. Issues with buck DC/DC tuning, power mosfet that has been enhanced and many more that I already forget. Card will be rerouted and then it’s ready to go.
Software has improve a lot to makes kiwee as foul proof as possible. Some examples : output power are checked before being switched on . Hot generator plug / unplugged is ok too. We have a test routine to check that setup is ok before reeling out. Otherwise you will just end up with an enormous knot. Well that is hundreds of small details.
Dominique ( my associate ) went to Niger with 3 “african kiwee” last week to pump water from well. He came back yesterday, don’t know yet how it goes . He was with a french embassador and a dozen armed guys for protection knowing the political context in Niger at the moment. “African Kiwee” is a light version of kiwee with no electronic control, only a DC/DC converter.

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Thanks, dave. I Had some news by email from dominique today. He told me he did mean power output around 80W throughout the trip. Unfortunately it seems kiwee worked really well but the pump we bring failed… Damn it. Hardware is hard

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