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Ghost Whisper 101/590/330 top speed?

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deniska
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Re: Ghost Whisper 101/590/330 top speed?

Postby deniska » Fri Mar 22, 2019 4:13 am

ramin77 wrote:
Fri Mar 22, 2019 2:52 am
I ride the Moses Vorace 101 mast with a 590 front wing and 330 stabilizer. The 590 is very capable of going 22-25 mph. If it’s not stable in the 18-20mph range I would say something isn’t right. Have you sanded it?
Nah, as I said a friend just asked me to ride it and tell him my opinion. I doubt he'll be sanding it soon - way too new and shiny :-)
Mine is sanded, but it's an older and longer mast and RDB freerace wings which are higher aspect. It can probably hit 30mph before it becomes unstable..
The reason I asked is that the slingshot claims that 590 is supposed to go up to 30kts with this rig and I was nowhere close to this speed..
maybe it's just me..

https://www.slingshotsports.com/Ghost-Whisper-101

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Re: Ghost Whisper 101/590/330 top speed?

Postby AndrewO » Fri Mar 22, 2019 5:28 am

deniska wrote: ...
but every time I'd try to push it a bit more it would suddenly dive and eject me.
...
deniska wrote: ...
was trying to go low speeding up for a jump
...
These two pretty much make me think it is the cavitation phenomena (windsurfers call it spinout, equivalent to "stalling" in flight terminology) - momentary loss of lift (or lateral resistance for WS fin).

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Re: Ghost Whisper 101/590/330 top speed?

Postby james » Fri Mar 22, 2019 8:33 am

Spin out is when you overload the fin, and the flow detaches from the windward side of the fin stalling it

Cavitation is when the water passing over the fin is at such high pressure it boils and the fin/mast looses grip and stalls

One is caused by going so fast the water boils the other isn’t.

No one on here is going fast enough to cause cavitation.

Ventilation is what is happening.

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Re: Ghost Whisper 101/590/330 top speed?

Postby james » Fri Mar 22, 2019 8:39 am

One thing that happened with some of the moses race masts ( they build slingshots foil gear) is that the sticker on one side of the mast was slightly raised under the top coat causing ventilation on one tack

It could be the same with this looking how far down the mast the logo is

Adjust the base position to get a better front foot balance wipe it clean
And if that doesn’t work lightky wet n dry the area wher the logo is to flat it down

And that rig should be doing 30 comfortably

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Re: Ghost Whisper 101/590/330 top speed?

Postby xulpix » Fri Mar 22, 2019 9:43 am

TomW wrote:
Thu Mar 21, 2019 7:00 pm
Perhaps I was a bit harsh, no offence meant.

I rode a 590/330 combo for over 50 hrs. Never had that behaviour.
Both my 550 and 590 are sensitive to getting any sea grass on the wing, they lose a lot of lift. The 633 is not.
I did notice that any breach or tip ventilation on them was more critical and difficult to recover from compared to the 633
Both the 590 and 633 don't like to be pushed hard with a lot of power upwind with board heeled way over. I'm on 2016 93cm fluente mast.

I'm not a racer or pro/advanced level rider, basically cruise around doing carves and riding small swells.


Image

Breaching with 550... no issues at all....!


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