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New homemade hydrofoil and rider !! Advice?

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tahoedirk
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Re: New homemade hydrofoil and rider !! Advice?

Postby tahoedirk » Thu Sep 04, 2014 3:26 pm

Great, I thought 9 cm was on the narrow side though. Do you mean because it's 58 cm?

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Hawaiis
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Re: New homemade hydrofoil and rider !! Advice?

Postby Hawaiis » Thu Sep 04, 2014 5:52 pm

For hydrofoils, the limit for me at 65 kg is
Kite size Wind speed in knots
Low wind limit
19 5.5
17 6
14 7
11 8
8 9

Even if your fuselage look a little too big, you should be able to kite in less than 10 knots.

tahoedirk
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Re: New homemade hydrofoil and rider !! Advice?

Postby tahoedirk » Mon Sep 08, 2014 4:29 pm

I spent some hours on my foil this weekend. 4 sessions of perfect nine meter. I switched to my smaller front foil and it seems easier to control the pitch with it, a little slower to pop up too. By the 4th session I was able to go downwind too, kind of. I also got to see many HF models in person. Even though it is as least as strong and stiff as all the models I handled, I've decided to revise my next fuselage design to a more tubular shape so that it looks as cool and sleek as all the others.

I also discovered that tequila has no value at all for learning to hydrofoil .

tahoedirk
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Posts: 82
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Style: out of control
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Re: New homemade hydrofoil and rider !! Advice?

Postby tahoedirk » Mon Sep 08, 2014 8:21 pm

New look.
Attachments
20140908_120903.jpg

Tone
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Re: New homemade hydrofoil and rider !! Advice?

Postby Tone » Mon Sep 08, 2014 8:36 pm

tahoedirk wrote:New look.


great effort mate! :)

Edge19
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Re: New homemade hydrofoil and rider !! Advice?

Postby Edge19 » Mon Sep 08, 2014 8:42 pm

Good Job there, what dimensions have you made your latest wing to?
ive made a high aspect wing at the moment its about 70cm and a cord from 10cm at root to 6cm at tip.
i know the Spotz is about 55cm not sure what the surface area is on the spotz. mine works out about 644cm/2.

Wing dimension vary so much its difficult to decide the final cut.

Top Tip with the Tequila :lol:

tahoedirk
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Re: New homemade hydrofoil and rider !! Advice?

Postby tahoedirk » Tue Sep 09, 2014 12:08 am

this wing is 58 cm and goes from 9 cm at the widest to approx 7 cm at tip. About 460cm2. I will skinny up the tips to 5ish on my next try. It is difficult to nail the final dimensions after adding 20+ layers of glass. I will make molds as soon as I have a standout foils to choose. Choosing is extra tough since I can barely go downwind , and I have only nailed one cool jibe so far. I love being a beginner again !!!
Dirk

Edge19
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Re: New homemade hydrofoil and rider !! Advice?

Postby Edge19 » Tue Sep 09, 2014 8:24 am

Ok thanks Dirk,

Good to have an idea on what to aim for. I know this is a very personal question and you don't have to answer it online, but how much do you weigh?? :D :D I'm around 90kg dress like the day I was born but with gear on, say towards the 100 kg ish.

Do you need quite a bit of speed to foil with this wing ?
Cheers

tahoedirk
Medium Poster
Posts: 82
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Local Beach: Kings beach, CA
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Style: out of control
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Re: New homemade hydrofoil and rider !! Advice?

Postby tahoedirk » Tue Sep 09, 2014 3:34 pm

That's not very personal , I can do way worse. I weigh about 75. That wing goes fine in light wind.

The totally obsessed guys I met had switched their high dollar rigs to tiny thin custom foils their friend had made. They seemed to work great in moderate wind

Edge19
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Posts: 96
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Local Beach: southend
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Gear: Ozone Edges
RRD Rapida
Airush Sector 60
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Re: New homemade hydrofoil and rider !! Advice?

Postby Edge19 » Tue Sep 09, 2014 3:50 pm

Lol so could I :lol: Ok so I make yours to be 6.1333 cm2 per kilo which mine would be 6.77 - 6.44cm2 per kilo with my wing.... Obviously there are other factors involved but this could be a nice way of calculating surface area to weigh ratio! As a guide for new wing builds.
Would be interesting to see how small this number could be.

Just worked it out I could go to 583 cm2 to get to 6.13 cm2/kg there abouts hmmmm very interesting

Thanks for your info Dirk keep us informed

Take it easy easy


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