Monthly Archives: April 2015

Kite Foil Gold Cup: The raptor


Raptor kitefoil

Earlier this year, the first stop of The Kite Foil Gold Cup was held in La Venta, Baja Mexico. The event was loaded with international talent and a large variety of board and foiling combinations from around the globe. Short, skinny, rounded edges, blunt noses, pointed tails, you name it, but nothing, stood out like Adam Koch’s entry, the conceptual Raptor which was completed just days before contest time.

Adam is back on Maui now where internet speeds are faster than the escargot pace of Baja and sends us this report in the board!

Read the entire post on

The foil alphabet

By Fred Monsonnec

The foil alphabet by Fred Monsonnec

Rudders and centerboards with hydrofoils, wing masts… “we are in the age of wings” (and now, not only on multihull…). The “C-foil” and the “L-foil” are well known, but naval architects, engineers and enthusiasts have designed many other kinds of foil – or letters in a foiler lexicon that now includes C, E, J, L, O, S, T, U, V and Y.

Click here for the “The Foil Alphabet”, an article written in 2014 for the French blog Foilers, translated with the help of Nicholas Waller.

More about Fred Monsonnec and credit for Nicholas Waller

7 in Punto – 7 Gold Telepadova. 10 aprile 2015, intervista a Luca Rizzotti presidente Foiling Week

7 in Punto è la sveglia dell’informazione e dell’attualità di chi vive a NordEst, una piazza virtuale, in cui Antonella Prigioni, Alessandra Mercanzin, Valentina Polati, Stefano Pittarello e Roberto Guidetti, fanno da ponte tra l’ospite in studio e il Triveneto, dando la voce al cittadino. 7 in Punto trasmette tutti i giorni dal lunedì al venerdì, dalle 7.00 alle 8.30, prodotto negli studi della redazione giornalistica di 7 Gold.

The sound of speed

Video and ink From Bill Springer

After test-flying the fully-foiling G4 from Gunboat in St. Martin for the last several days, I can’t stop smiling. And I’m sure any of the lucky few that were there for the first flights would agree. Words, and even the remarkable photos of the first days of G4 flight can’t fully capture what it feels like to sail/fly aboard a 40-fo0t catamaran that’s not only capable of hitting 31.9 knots with a crew of non-pro sailors, but is also equipped with comfy bunks, and 360-degree visibility in the large main saloon, and even a kitchen sink and a fridge for cripes sake! And wait till you see how big the cockpit is. So I’m not even going to try.

Just watch this video. And be sure to watch it on a high-rez computer in full-screen mode. And oh yea, turn the volume up. This is what pure speed sounds like. And this is only a taste. Be sure to watch for my full report in a upcoming issue of Boat International and for much more info, including a stunning video from Gunboat that shows much, much more than just the underside of the bridgedeck!

And if you really want to see what the future looks like in person, head on down to Saint Barth’s for Les Voiles next week, or Antigua Sailing Week later this month. The G4 is sure to be one of the main attractions.

March 1972, the first foiling Moth

Franks Foiler  

By 1970 I had been interested in hydrofoils for some time as a
member of the Amateur Yacht Research Society, and I had made several
successful sailing models. It occurred to me that any high performance
racing dinghy should make a good platform for adding hydrofoils.


I had a moth “Renegade IV” which had been Queensland Champion in 1969. The sail
area at less than 82 sq. ft. was smaller than any sailing hydrofoil that
I know of. (And may still stand as a record if you discount foiled

In adding foils I did not want to modify or ruin the boat so I
utilised existing attachment points for stays and rudder. I did have to
screw the bow foil gantry to the noseblock however.

The configuration I developed was unique – two main lateral
foils, 6′ by about 14″, surface piercing, for lift, stability and
lateral resistance set at about 45deg. dihedral. For steering and pitch
control there were rudders fore and aft with foils. On the aft rudder
was a low-dihedral submerged foil 6″ chord by about 3′ span. The surface
piercing foil on the bow rudder was of somewhat greater span and set at
about 30deg. dihedral. The two rudders were linked so that the lateral
foils were not loaded or unloaded when turning. The linkage could be
adjusted so that (in theory) more or less pressure could be thrown on
the lee foil.

The foils were shaped by hand in the laundry of my Shepparton
unit out of the toughest Australian hardwood I could find. The section
was flat on the bottom with a slight curve up at the leading edge, and
arc of circle on the upper surface. The leading edge was sharp.
Thickness would have been less than 8%.

The first trials at Albert Park Lake and on Lake Glenmaggie were
hopeless (and incidentally everyone who saw the boat strongly affirmed
that foiling would be impossible). The “stick and string” structure was
a bit like a certain brand of collapsible furniture in that nothing held
up until everything was locked in place.


The boat could be launched and sailed off a beach in conventional
mode, then in deep water the foils lowered and the centreboard

Finally in March 1972, at Cabbage Tree Creek near Brisbane,
Queensland, I achieved lift-off in about 15 knots of wind.

The best thing about it was how easy it all was – it was
absolutely controllable and stable with no vices. Any dummy could have
sailed it, though I think only my mate Tony Turbot ever did. It was he
who took the photos with my Box Brownie and his colour camera.


On the foils it was about as fast as the Mark II Moth that was
sailing there at the time. Once, as I remember, I almost managed a gybe
on foils. It came down after the sail came across and just before I
could power up on the new tack. I usually gybed because tacking involved
a stern board.

Off the foils it sailed ok but was slower than a sabot.

Its worst feature was its intolerance of even small waves. They
sucked it down off the foils. I eventually bust the bow foil pushing it
in waves. The hardwood bent like a steel spring before it broke.
Thereafter it would not foil – I could only get it to do half-hearted
“bunny hops”.


ony bought the boat as I was on my way overseas. The boat
eventually cracked up. The foils I never saw again.

All this is true, so help me God.

P. Frank Raisin (11th. Jan. 2008)

Source post

Foiling in the USA

Foiling in the USA is April 9 at 7pm EST

This is the HOTTEST TOPIC in sailing today and since there has been overwhelming interest in this discussion, Thursday’s talk will be broadcast LIVE with the help of LiveStream producers


A Q&A will be held with the live audience and a TWITTER Feed will be used to handle questions from viewers around the world

The New York Times correspondent CHRIS MUSELER makes sense of the latest developments
GunBoat founder PETER JOHNSTONE on live SkypeVideo chat about the foiling G4 cruiser/racer catamaran in trials THIS WEEK!

The Foiling Week founder Luca Rizzotti will chime in from Lake Garda to explain the vibe when the world’s top foil designers get together to create the future of the sport

AND contributions from other influential visionaries including radical kite foiler Bryan Lake, Waterlust Project filmmaker Patrick Rynne, US Sailing Executive Director Jack Gierhart and more!!!

It Happens at Doyle Sailmakers This Thursday Night, April 9th 7PM
If you want to come in person drive to Doyle Sails LI,1345 New York Ave.
Huntington Station, NY 11746
We’ll Have Pizza, Bring Your Own:

  • Bottle
  • Folding Chair
  • Slippers for the floor
  • $15 Donation for Chris’s Efforts

Please RSVP to: