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Foiling on a gusty day at the lake
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NOVAAN



Joined: 28 Sep 1994
Posts: 1549

PostPosted: Tue Jun 25, 2019 11:33 am    Post subject: Foiling on a gusty day at the lake Reply with quote

I had windsurfing friends down so I didn't foil. It was pretty gusty maybe 8 to 22. Really a lot of work on a bigger board. One of the local foiler's stopped by on his way home from the Gorge. Told me that all he did was foil up there. 3.2 on up. I was amazed how efficient he was on his foil. Up wind, down wind and way faster than anyone on a windsurf board. Beautiful long foiling turns. Short hard carves on the foil. Made me think that I had a bunch to learn. Also made me want to try harder. He is in his 3rd year foiling. On a sling Shot Wizard 105 and the Ghost Whisper foil. Most of the windsurfer's watching me weren't sure if foiling was worth it. After watching him they are changing there opinion. If your on the fence about foiling you should really give it a try....
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dllee



Joined: 03 Jul 2009
Posts: 5329
Location: East Bay

PostPosted: Tue Jun 25, 2019 11:47 am    Post subject: Reply with quote

Like watching Wyatt before foil, eh?
Or Robbie at 'yards?
Antoine at Defi?
But "faster than windsurf?" Your windsurfers are just bad, or beginners, or using the wrong gear.
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NOVAAN



Joined: 28 Sep 1994
Posts: 1549

PostPosted: Tue Jun 25, 2019 8:41 pm    Post subject: Reply with quote

Faster that day by a long shot
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dllee



Joined: 03 Jul 2009
Posts: 5329
Location: East Bay

PostPosted: Tue Jun 25, 2019 10:12 pm    Post subject: Reply with quote

If a shortboarder is slogging, that is NOT the measure of his speed.
A rec type foil like Naish, Inf 76/84, Np Glides will top out at around 22mph.
A slalom foil might top out at 38, but the same rider will go 10mph faster on slalom gear.
The top American foiler might just hit 34, but he's much faster on his Isonic boards.
Foils do go upwind easily, which is their main draw for the majority of foilers.
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LUCARO



Joined: 07 Dec 1997
Posts: 661

PostPosted: Wed Jun 26, 2019 1:23 am    Post subject: Reply with quote

dllee: The ghostwhisperer may have a significantly higher top speed than the other slingshot or naish foils.
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dvCali



Joined: 23 Aug 2007
Posts: 1314

PostPosted: Wed Jun 26, 2019 2:00 am    Post subject: Reply with quote

LUCARO wrote:
dllee: The ghostwhisperer may have a significantly higher top speed than the other slingshot or naish foils.

Indeed, wave and freeride windsurf boards rarely go above 25-26 knots. Take a racing foil and combined with its superior glide I can see how it can easily be faster than a regular windsurfer.

At Coyote when the wind is less than optimal foils easily beat windsurfers on the uptake and on the distance ... even if foilers are less experienced than windsurfers!


Last edited by dvCali on Wed Jun 26, 2019 10:29 am; edited 2 times in total
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coachg



Joined: 10 Sep 2000
Posts: 3550

PostPosted: Wed Jun 26, 2019 6:51 am    Post subject: Reply with quote

I think Dlee is saying it's the rider, not the ride. In other words, if the guy that was foiling on Novaans llake that day had windsurf gear he would still be the fastest one on the lake.

Coachg
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boardsurfr



Joined: 23 Aug 2001
Posts: 1266

PostPosted: Wed Jun 26, 2019 8:15 am    Post subject: Reply with quote

dllee wrote:

A rec type foil like Naish, Inf 76/84, Np Glides will top out at around 22mph.

Well, they topped out at 15 mph for me the first 10 sessions or so.

According to Slingshot, the Infinity 84 has a top speed around 20 knots (23 mph); the 76 does 25 knots (29 mph); and the Infinity 65 does 30 knots (35 mph). The Ghost Whisper is a full carbon race foil with a longer (up to 111 cm vs. 90 cm) mast and should be at least as fast as the 65.

In our choppy waters, I have seen intermediate foilers (good flight control but jibes mostly with touchdown) go about as fast as windsurfers that were powered up. On a beam reach on freeride gear, that's around 18-20 knots on most days.

I'm just approaching 15 foil sessions, with 3 sessions on the current setup (Infinity 76 and 71 cm slalom board, no straps). I'm still a beginner, but my top speed has improved about a knot every session for the last 4 sessions, and now is 20 mph. This is "accidental" speed, I'm not doing speed runs yet. It's also on the 60 cm mast, which is clearly limiting in chop. On the 90 cm mast (which requires a higher tide), 20 knots should not be far off.

The bigger difference may well be in the angles. Windsurfers need deep downwind angles for top speed - typically 130 degrees. The speed difference to a beam reach is 25% or higher. For foiling sailcraft, the polar plots show higher relative speeds at beam reach and upwind angles, for example just 10%. That means for a windsurfer and foil that have the same top speed, the foil will be faster by about 15% on a beam reach.

In NOVAAN's example, we have a foiler on a race foil and and windsurfers on freeride gear (which is slower). Even with similar skills, the foiler would be quite a bit faster on the typical angles windsurfers sail - beam reach +- 10 degrees. If the foiler had more skills than the windsurfers, or the windsurfers were barely powered, the difference would be larger.



Polar plot 34 knots.jpg
 Description:
Windsurfing polar plot showing 25% higher speed at 130-140 degrees vs. 90 degrees.
 Filesize:  52.47 KB
 Viewed:  20801 Time(s)

Polar plot 34 knots.jpg


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NOVAAN



Joined: 28 Sep 1994
Posts: 1549

PostPosted: Wed Jun 26, 2019 9:47 am    Post subject: Reply with quote

All the windsurfer's were locals with many years on the water. All very good at their craft. The foiler the same. In that 9 to 22 mph wind range the foiler was the first guy going near shore in the lite wind. He could head up wind better than us at a higher speed. This allowed him to bear off in the lulls and keep his speed. Because the wind was lite on either end of the lake it was difficult to plane thru a turn on a windsurfer. Then had to pump and bear off wind to get going again. The foiler flew his turns with speed and was off and flying with almost no effort. Half the time by the time I got going again he was across the lake and way up wind. Was his top speed faster than us? I couldn't say because I/we could never catch him to find out. His VMG and over all speed was way faster. And he was on a 5.0 wave sail and we were on 6.5 sails and mostly on free race boards. Speed is not always about the top end and it showed on my little lake that day.
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d0uglass



Joined: 28 May 2004
Posts: 1286
Location: Bonita Springs, Florida

PostPosted: Wed Jun 26, 2019 10:16 am    Post subject: Reply with quote

My typical top speeds on the Infinity 76 wing are shit- only around 15-16 knots even when I feel nicely powered. The "25 knots" Slingshot lists for the foil seems unrealistic, but maybe there is some technique or tuning for high-speed reaching that I haven't figured out yet. I'd be interested in seeing the GPS tracks of somebody who is getting significantly faster speeds on it.

That said, the foil still sails circles around other windsurfing gear in light wind conditions and when upwind/downwind is involved, so the "speed is not all about top end" comment rings true for me.

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