refinishing Ventus 2cm- wing profile

Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. Ken

On Oct 30, 5:40*pm, wrote:
Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. *Ken

Isn't this wing the same as V2b except for the added tips? S9

On Oct 30, 6:40*pm, wrote:
Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. *Ken

the Ventus c model has 2 sets of wing tips,15m and 18m. I'am not sure
if it is the same as a Ventus 2b

On Oct 30, 8:11*pm, wrote:
On Oct 30, 6:40*pm, wrote:

Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. *Ken

the Ventus c model has 2 sets of wing tips,15m and 18m. I'am not sure if it is the same as a Ventus 2b David Lednicer's site shows a different airfoil for a Ventus 2 and a Ventus 2b no mention of a Ventus 2c.

On Oct 30, 3:40*pm, wrote:
Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. *Ken

Round in front, pointy in back, and smooth over the top and under the
bottom. That will do what needs to be done.

Thanks, Bob K.

On Oct 30, 6:07*pm, Bob Kuykendall wrote:
On Oct 30, 3:40*pm, wrote:

Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. *Ken

Round in front, pointy in back, and smooth over the top and under the
bottom. That will do what needs to be done.

Thanks, Bob K.

I have profiled several sets of wings and what Bob says is essentially
correct. I would profile the first 6 inches and fair the rest.
Getting the existing wing to "as-designed" is probably impossible
because the factory probably did not get it to that state when it was
built. Typically, the wing is too thick and the leading edge too
blunt.

On Oct 30, 3:40*pm, wrote:
Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. *Ken

Ken

SH does not publish their airfoil data, or glide polars for that
matter.
The Ventus airfoil has changed in subtle ways since the 1981 a/b model
introduction.
The most notable changes have been a sharper leading edge and a
thinner profile near the wingtip,
which showed up on the V2a/b and C models. Take Bob's advice and sand,
smooth, and polish.

Rick

On Monday, October 31, 2011 10:51:09 AM UTC-4, Rick Walters wrote:
SH does not publish their airfoil data, or glide polars for that
matter.
The Ventus airfoil has changed in subtle ways since the 1981 a/b model
introduction.
The most notable changes have been a sharper leading edge and a
thinner profile near the wingtip,
which showed up on the V2a/b and C models. Take Bob's advice and sand,
smooth, and polish.

Rick

Note also that the airfoils (even on the original
Ventus) are tailored for the Reynolds number change
towards the tip. One well-known expert measured the
coordinates near the root and just scaled them down,
reprofiled the wing using the (incorrect) airfoils
near the tip, and reported an (incorrectly measured)
performance improvement !

If you didn't get the coordinates from SH, beware
of any profile you might obtain...

So, smooth and pray ;-)

See ya, Dave "YO electric"

Ah, the joys of sanding... No better way to bond with your ship.
Similar in many ways to good foreplay...

Sorry.

Boggs

The joys of ever advancing computer computational power.
As things have become possible to calculate so the glider wings get more
complex. The current crop of 18m ships are currently approaching thirty
profiles over the ~8.7m of wing...

They generally blend the transition from one to the next, but you
certainly can't measure a station and extrapolate further out or inboard.

Yes they are not all made in CNC machined steel female mounds like the
JS1 - and even there I am sure there is manufacturing variation, but you
would have to think carefully before re-profiling significantly. Easy to
disimprove things.

On 2011/10/31 4:51 PM, Rick Walters wrote:
On Oct 30, 3:40 pm, wrote:
Can anyone help with the wing profile data for a Ventus 2cm? I need
the numerical data and if possible someone who could make templates on
a CNC. I have contacted US dealer with no response. Ken

Ken

SH does not publish their airfoil data, or glide polars for that
matter.
The Ventus airfoil has changed in subtle ways since the 1981 a/b model
introduction.
The most notable changes have been a sharper leading edge and a
thinner profile near the wingtip,
which showed up on the V2a/b and C models. Take Bob's advice and sand,
smooth, and polish.

Rick

--
Bruce Greeff
T59D #1771 & Std Cirrus #57