On Mar 16, 6:55*pm, Rick Walters wrote:
On Mar 15, 12:40*am, Ventus2NZ wrote:

Hi all

Has anyone fitted winglets to the 18M tips on a Ventus 2C?

I heard this may have been done in Europe, any information greatly
appreciated.

I would even look at getting some Maughmer winglets designed and mod
approved if I had enough interest from other Ventus 2C owners.

Alan.

Alan

The Ventus 2C 18m is not designed for winglets. It has extreme
polyhedral already
and the last short section of tip is turned up so high that a winglet
would prove worthless.
The V2CX improved the design by reducing dihedral and adding Maughmer
winglets. There is a
measureable performance improvement in the CX, but part of that is due
the new fin, rudder and
horizontal stab, and increased wingloading.

Rick Walters

Thanks for the replies.

I know the CX has a thinner aerofoil for the horizontal and vertical
tail surfaces. The outer aileron also extends right to the winglet
giving drag reduction at the tip. It is also a given that the increase
in MAUW is due to to an extra tank in the 18m tips allowing an
increase to 600kg provided the last 75kg's of ballast are carried in
the tips.
As far as the polyhedral goes, the JS1 has a very similar angle on the
last segment of the tip to reduce the toe angle to the winglet. Must
be a good reason for this, just food for thought.