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At what speed, will the hydrofoil will start to lift me ?

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Bille
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At what speed, will the hydrofoil will start to lift me ?

Postby Bille » Mon Nov 23, 2015 7:38 pm

I weigh 210-Lb , (95Kg) ; any idea what speed i'll be doing, when my Spotz-2 FreeRace
wing , will lift my weight ? It has 554cm2 aria.

It just dawned on me , that when people say they can foil in a 6Kt breeze ; the actual
speed of the foil in the water, is Much faster, than that !!

Bille

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Hawaiis
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Re: At what speed, will the hydrofoil will start to lift me

Postby Hawaiis » Mon Nov 23, 2015 7:43 pm

My wild guess is about 14 knots. The hydrofoil can easily go at triple the wind speed. You can also use the kite at a higher angle to help you lift off the water.

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Re: At what speed, will the hydrofoil will start to lift me

Postby meteo » Tue Nov 24, 2015 12:27 am

Unfortunately I think Hawaiis is right...

My LF lifts me up at about 5kts... My Spotz3 lift me at about 10kts, but very unstable until I hit 12kts...

I always look at my watch when riding... and every time I get a good launch with the Spotz3, I look at my watch and I am at about 13kts almost instantly...

I weight 165lb(75kg)...

You will find that 13kts is very fast for a beginner, that’s why a beginner starts with a beginner's foil... I was speaking to Damien Leroy this past weekend (Cabrinha demo) and he told me that the Cabrinha foil was much slower than the LF and thus much easier to learn on...

They call them a «fun» foil... which is a better term for them... because it is fun to ride them... and learn tricks...

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Bille
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Re: At what speed, will the hydrofoil will start to lift me

Postby Bille » Tue Nov 24, 2015 12:38 am

meteo wrote:Unfortunately I think Hawaiis is right...
...
I weight 165lb(75kg)...

You will find that 13kts is very fast for a beginner, that’s why a beginner starts with a beginner's foil...
...
OOPS , I did it again ; i hate it, when i choose poorly . :angryfire:
I already spent the money ; best i can do now , (is make it bigger) , or put a
flap on it . Dang-It !!

Bille

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Re: At what speed, will the hydrofoil will start to lift me

Postby Regis-de-giens » Tue Nov 24, 2015 12:47 am

As far as i remember ketos was providing the minimum "flight speeds" for each of their wing. But i cannot recover the information anymore. As far as I remember it was 8 knots for the "freeride" and 4 knots for the big "eazy" wing.

It's depending on rider's weight of course but it gives some approximations for a "Standard" rider.

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Re: At what speed, will the hydrofoil will start to lift me

Postby Starsky » Tue Nov 24, 2015 1:32 am

Zeeko had it on their site too and it was 7-8 knots for the alloy set up.

I have no idea if thats true, but its possible to ride quite slow if you want to.

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Re: At what speed, will the hydrofoil will start to lift me

Postby ozchrisb » Tue Nov 24, 2015 2:08 am

Don't worry, I learnt on a race wing and plenty of other people around here did too. Just remember when you're learning that you want to go fast enough for it to fly, don't force the wing up, it'll let you know when it's ready ;)

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Re: At what speed, will the hydrofoil will start to lift me

Postby davesails7 » Tue Nov 24, 2015 3:35 am

I don't think lift off speed would be as high as 14 knots. I learned on an early race foil (harder to ride than spotz2) and now I'm riding spotz2.

I've never purposely tried to see how slow I can go, but looking back at some of my GPS tracks, I see lots of runs where I'm cruising along at 11-12 mph (10 knots). I could probably go slower if I really tried.

I'm only 160 lbs, but lift being proportional to speed squared, shouldn't be much faster to get you going sqrt(210/160)*10= 11.5 knots.

Next time I'm out with my GPS I'll try to see how slow I can go for a sustained distance.

Also, lift off speed was never the problem for me while learning. My problem was always getting going way too fast when already on foil and then overfoiling and crashing.

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Re: At what speed, will the hydrofoil will start to lift me

Postby cglazier » Tue Nov 24, 2015 6:32 am

My Spotz2 certainly gets me foiling at board speeds well below 10 knots. This starting speed is not a problem for beginners.

But the Spotz certainly has a higher top speed than slow beginner ones (like the Liquid Force) and it can be a challenge to control this speed when you are learning. But it is not really difficult and most people can learn on foils like the Spotz or Taaroa or Alpine which have good performance.

Think carefully before you buy a hydrofoil which might be a bit easier for the first few hours of your learning process but then will feel like a slug compared to better ones.

:wink: CG

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Re: At what speed, will the hydrofoil will start to lift me

Postby revhed » Tue Nov 24, 2015 8:25 am

meteo wrote:Cabrinha foil was much slower than the LF

Slower than slow :o
If that "slow" is due to poor hydrodynamics then the "fun" factor of feeling your foil "slice" thru the H20 is not there. :roll:
What a DRAG and ashame for guys who don`t know the difference.
cglazier wrote: Think carefully before you buy a hydrofoil which might be a bit easier for the first few hours of your learning process but then will feel like a slug compared to better ones.

Exactly my thoughts and why I try to let beginners know, buy once, buy correct, do your research!
R H


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