Contact   Imprint   Advertising   Guidelines

Surf foil self-sailing up wind

A forum dedicated to Hydrofoil riders
merl
Frequent Poster
Posts: 239
Joined: Tue May 15, 2007 8:43 pm
Gear: RL kitefoil
Newind split wave

CA Pulsion 12m
FS Peak 4 5m
Gong strutted 9m
Slingshot SST 7m
Gong strutwave 5m
OR Razor 4m
Brand Affiliation: None
Location: West Sweden
Has thanked: 19 times
Been thanked: 6 times

Re: Surf foil self-sailing up wind

Postby merl » Mon Dec 16, 2019 11:27 am

Peter_Frank wrote:
Sun Dec 15, 2019 8:52 pm
I have the very opposite experience.

In light winds say 7-9 knots (at 10 m height), where there is hardly ANY wind down at the surface, most hydrofoil combos will sink down to board flat either fast if heavy aluminium, or really slow if light carbon and big wings, .
....

If you got a foil that ALWAYS sits on its side when put into this position, in "no" wind also, you got a problem indeed :(

8) Peter
I think my combo will sit on its side indefinitely. RL Orca, which is a 663 copy Wing only slightly heavier than the original, and a relatively light and short (75cm) alu mast. But I think the thing that makes it worse is a low volume board. The rail sinks deeper so the mast is more horizontal to the water in a very stable position.

Herman
Frequent Poster
Posts: 363
Joined: Tue Jun 04, 2019 7:09 pm
Style: My Own.
Gear: SLE, foils and C kites, TTs, Directionals, Landboards, Buggy.
Brand Affiliation: None
Has thanked: 47 times
Been thanked: 78 times

Re: Surf foil self-sailing up wind

Postby Herman » Mon Dec 16, 2019 11:41 am

If the centre of lateral resistance (water) aligns with the centre of effort from the windage it will sail along. If the centre of effort is behind the centre of lateral resistance it will turn into wind, in front, it will bear away. If the centre of effort moves forward as it heads up to align with the centre of lateral resistance and vice versa you will get more body dragging practice. Just my theory. Somebody had the idea of adjustable buoyancy which would help.


Return to “Hydrofoil”

Who is online

Users browsing this forum: No registered users and 3 guests