Which kite company could break the speed record?

[Toby]

C

What happened here?
Account got hacked?

The OP deleted his question. I restored it to keep the info alive, since it is interesting.

Would be nice if a certain user would watch his words if someone has a different opinion. That reply got deleted.

[Matty V]

My words?

I am all for different opinions but when you reply with the answer get ignored, told you are wrong and then they keep going down the wrong path stating things as fact when they aren’t it gets “frustrating”

Kites, as I’ve said, are not the issue you only have to look at all the other Kite powerd records for land or ice and the numbers are far higher than what is achieved on water

[AndersP]

[Bille]

Sail rocket did not use a super cavatating foil. I don’t know how clear that needs to be made to the OP

...

Matty , I respect ya , so perhaps you could clear up a bit of
confusion in me ; this video is what parallels my understanding
on how sail rocket worked :



Bille

[Matty V]

What do you want cleared up? Paul has never made public images plan section of the foil actually used. So I am highly sceptical that the image above is accurate from his own description.

He has explained that it used a base ventilated foil so the entire trailing edge sits in an air bubble with flow over both sides

The force alignment of the wing and the foil pulling against each other is correct in the vid, to the point that once set on a run the boat was in perfect balance with minimal pilot input needed.

A low speed rear retractable rudder was used which then kicked up with a smaller rudder on the front pontoon that then took over

[AndersP]

What do you want cleared up? Paul has never made public images plan section of the foil actually used. So I am highly sceptical that the image above is accurate from his own description.

He has explained that it used a base ventilated foil so the entire trailing edge sits in an air bubble with flow over both sides

The force alignment of the wing and the foil pulling against each other is correct in the vid, to the point that once set on a run the boat was in perfect balance with minimal pilot input needed.

A low speed rear retractable rudder was used which then kicked up with a smaller rudder on the front pontoon that then took over

"He has explained that it used a base ventilated foil so the entire trailing edge sits in an air bubble with flow over both sides"

That is supercavitating!

A controlled cavitating foil with a bent wedgelike form, blunt at front and square in the end. Yes it was ventilated at the back end to keep a stable ventilation. And that is a supercavitating fin/foil

[Matty V]

If you can’t see the difference then I can’t help you

[Matty V]

Apologies for insisting on the specifics, base ventilated is specific to sail rocket, that’s what was asked so that’s what I answered.

On your two points

Yes. And it’s a safe bet I have had more time at over 40kts on water than most on here including you

No. I get pissed off with arm chair experts claiming black is white while having minimal experience of the field they are attempting to re write.

Have you actually been speed sailing?

SP80 is using Gin kites, they are also using a surface craft with a foil section that will directly oppose the force of the kite in the same manner that sail rocket operated in.

Syroco is likely using FONE using a fully submerged wing section again working in opposition to sail rocket


A person standing on top of a hydrofoil board doesn’t have the same force alignment as either concept or sail rocket. Crucially the force is also going through the soft squishy rider rather than a titanium bearing. The rider will be worn out long before the titanium.

[Bille]

Everything in this post ...

Thank you for clearing that up !

NO disrespect, to anyone I may have mentioned ; for me it's
a learning curve, and nothing more .

Again :
I respect Matty ; he has a lot to say , that i mostly agree with !

Bille

[Baptiste_FR]

I don't know anything about foil design. But I've listened to an interview with 3 members of the SP80 teams (it's in French but Youtube can translate/subtitle in English





They speak about material, coping with technical and financial problems and the first attemps.They seem really confident to at least beat the Sail Rocket record, the 150 km/h goal is also reachable.
When they speak about their main opponent (Syroco) they said that each project had to find their own balance between stability and performance. SP80 chose stability with a Trimaran vessel while Syroco chose performance with a "rocket" type design.