A forum dedicated to Hydrofoil riders
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Thatspeck
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Postby Thatspeck » Tue Feb 25, 2020 9:12 am
Interesting, at AR 5.7 that doesn’t appear much if any higher aspect than a Gong XL pro which is maybe 4.7ish.
There’s a guy here in Corralejo using one winging, he does well on it. He’s usually on a very nice custom board but the other day had it out on an 6’ inflatable foil board(?!)
He looks to be about 75Kg.
The 633 really looks like a broken dinner plate by comparison
Edit: I see the XL pro was measured by someone at AR 4.43 here;
https://docs.google.com/spreadsheets/u/ ... 4/htmlview
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Peter_Frank
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Postby Peter_Frank » Tue Feb 25, 2020 4:17 pm
The XL Pro is 92 cm in span, 1733 cm2 projected and 1912 cm2 surface area.
Giving AR of 4.9 and 4.4 depending on which area you refer to.
So I doubt it is measured, it is calculated from their specs.
Still pretty high, medium at least, compared to our 1200 cm2 wave kitefoil wings are often 3.3-3.4 (Moses Onda, Ketos Kool t.ex)
Peter
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grigorib
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Boards: Spleene RIP 37, Flysurfer Radical6 138, Flysurfer Flydoor5 XL, Slingshot/Moses/RDB 70/90/101cm masts with 1200/860/800/730/600 kitefoil or 2200/1700/1400 wingfoil wings and 310/230/425 stabilizers, Naish MicroChip 80cm, 36" Woody, Slingshot Dwarfcraft Micro 100, MBS Comp 95x
For sale: Slingshot Turbine 9/13m, 20” Guardian bar, 1700 sq.cm wing/fuselage/stabilizer fitting Moses mast
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Postby grigorib » Wed Feb 26, 2020 2:55 pm
dave1986 wrote: ↑Wed Feb 26, 2020 4:24 am
Here are a couple of comments from Gunnar from one of his YouTube videos comparing the Moses 1100 and 873.
This brings me to a question - at same wing area (and let's assume profile thickness) what are benefits of lower aspect wing
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Peter_Frank
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Postby Peter_Frank » Wed Feb 26, 2020 3:15 pm
Lower aspect will be easier, meaning stall more gentle.
And will be more agile, easy to turn fast, can turn on a dime (you know that, so you also wondered grigorib, I can read...).
I wondered (questioned?) about Gunnars comment about the 1100, but as I havent got nor tried these wings myself, one wing could be more flat than the other, or other big differences.
Explaining the odd opposite effect (if true) that it turns faster eventhough much higher span.
Peter
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Frankieboy
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Postby Frankieboy » Sun Mar 01, 2020 5:19 pm
I tried my new 633/450 the past week in light wind.
Plenty of lift ! But very slow and gets unstable above 15 knots. Pretty convenient in the waves.
Also I had to stand with my back foot in front of the mast which was the limit for my pocket board (I think it does also put too much pressure on the rails - possible damage I heard the board cracking...).
It did cavitade a few times when carving frontside if too high on the 82cm mast. The 450 is BIG and easilly gets out of the water...
I had the chance to try a 330 from another Moses rider and I had less lift and the glide was soooo much better ! The 633 was much faster with very good stability. I will add this one to my quiver and shim the 450 for those lightwind days, for winging and carving.
I plan to buy a KS 37" but doubt the 450 would work without shimming it. Does anyone ride this setup KS 37" / 633 / 450?
tx
Frank
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grigorib
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Boards: Spleene RIP 37, Flysurfer Radical6 138, Flysurfer Flydoor5 XL, Slingshot/Moses/RDB 70/90/101cm masts with 1200/860/800/730/600 kitefoil or 2200/1700/1400 wingfoil wings and 310/230/425 stabilizers, Naish MicroChip 80cm, 36" Woody, Slingshot Dwarfcraft Micro 100, MBS Comp 95x
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Postby grigorib » Sun Mar 01, 2020 10:59 pm
Weighed 679 vs 683s and the 679 (wrapped in plastic) is 74g lighter. As reported previously by others the geometry is the same except 683s has more rounded back of ends of wingtips
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grigorib
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- Gear: Kites: Slingshot Rally 5/7/9/11m, Turbine 9/13m, SST 4/5m, UFO 3/5/7/9m, Flysurfer Speed4 10m standard, Flysurfer 2cool 6m, Peter Lynn Venom II ARC 16m
Boards: Spleene RIP 37, Flysurfer Radical6 138, Flysurfer Flydoor5 XL, Slingshot/Moses/RDB 70/90/101cm masts with 1200/860/800/730/600 kitefoil or 2200/1700/1400 wingfoil wings and 310/230/425 stabilizers, Naish MicroChip 80cm, 36" Woody, Slingshot Dwarfcraft Micro 100, MBS Comp 95x
For sale: Slingshot Turbine 9/13m, 20” Guardian bar, 1700 sq.cm wing/fuselage/stabilizer fitting Moses mast
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Postby grigorib » Sun Mar 01, 2020 11:03 pm
bigwave wrote: ↑Thu Jan 02, 2020 7:48 pm
Here's a couple pics of the 683 and 679 wings together. The first pic is the 679 on top of the 683. They are IMO identical. The distance from the leading edge to the tip is exactly the same on both wings. Sorry , I do not have the 421 Stabilizer in stock for a comparison.
thumbnail_IMG_5173.jpg
funny, on opposite my 683s has more rounded trailing edge of wingtips compared to 679
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grigorib
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- Local Beach: OBX; Clinton Lake, IL; Lake Michigan; Hood River; La Ventana; Ocean Park, PR; SPI; Tawas, MI
- Gear: Kites: Slingshot Rally 5/7/9/11m, Turbine 9/13m, SST 4/5m, UFO 3/5/7/9m, Flysurfer Speed4 10m standard, Flysurfer 2cool 6m, Peter Lynn Venom II ARC 16m
Boards: Spleene RIP 37, Flysurfer Radical6 138, Flysurfer Flydoor5 XL, Slingshot/Moses/RDB 70/90/101cm masts with 1200/860/800/730/600 kitefoil or 2200/1700/1400 wingfoil wings and 310/230/425 stabilizers, Naish MicroChip 80cm, 36" Woody, Slingshot Dwarfcraft Micro 100, MBS Comp 95x
For sale: Slingshot Turbine 9/13m, 20” Guardian bar, 1700 sq.cm wing/fuselage/stabilizer fitting Moses mast
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Postby grigorib » Mon Mar 02, 2020 4:03 am
Friend shared her feedback on 679 vs 633
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grigorib
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- Local Beach: OBX; Clinton Lake, IL; Lake Michigan; Hood River; La Ventana; Ocean Park, PR; SPI; Tawas, MI
- Gear: Kites: Slingshot Rally 5/7/9/11m, Turbine 9/13m, SST 4/5m, UFO 3/5/7/9m, Flysurfer Speed4 10m standard, Flysurfer 2cool 6m, Peter Lynn Venom II ARC 16m
Boards: Spleene RIP 37, Flysurfer Radical6 138, Flysurfer Flydoor5 XL, Slingshot/Moses/RDB 70/90/101cm masts with 1200/860/800/730/600 kitefoil or 2200/1700/1400 wingfoil wings and 310/230/425 stabilizers, Naish MicroChip 80cm, 36" Woody, Slingshot Dwarfcraft Micro 100, MBS Comp 95x
For sale: Slingshot Turbine 9/13m, 20” Guardian bar, 1700 sq.cm wing/fuselage/stabilizer fitting Moses mast
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Postby grigorib » Wed Mar 04, 2020 1:13 am
This I guess
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SparD
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Postby SparD » Tue Mar 10, 2020 9:27 am
live2play wrote: ↑Tue Feb 11, 2020 2:56 am
SparD wrote: ↑Mon Dec 16, 2019 11:15 am
A few close up pics of the new race machine
Have you had much time on the new race foil yet?
I tested it twice, it's very rigid and stable.
it's a good foil but I prefer my ML B5.
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