After the big success with the RADON family (ARTAX, AERON, RADON), we collected feedback from many pilots, and from this made a to-do list for our further developments.
 
The main goal was to make the handling easier and more comfortable: less brake pressure, better reaction with smaller brake inputs. With lots of different prototypes we tried to realise the perfect handling wing.
After trying around with modifications of the AERON, which didn't offer the big step we wanted, we were trying some untypical groundshapes, different airfoils and played around a lot with the sail tension. We were also experimenting with lots of different wing curves, brake geometries and trims.
I needed a while and around 20 prototypes to get a wing which was satisfying our demands.

With the TATTOO we found the right balance:
The brake pressure is light, but the feedback is still good.
The glider needs only a little input to react, but the brake travel is still long enough.
Although the wing turns agile and very dynamic, the thermalling performance in weak lift is the best we ever had in this class.
 
Another goal was to offer a wing, which is flyable by a big target group. It should be a normal high level intermediate glider, with not too high demands. So the TATTOO is offering a high safety potential: it collapses quite smooth and gives the pilot enough time to react. It doesn't have any tendencies for line tangles and is quite easy to control in even extreme manoeuvres.

And last but not least, the new wing should certainly offer a higher performance level than it's predecessor. So we had to find an airfoil which is offering the smooth collapsing behaviour and the ability to be very fast and stable. In that point we were a bit lucky: One of the first schemes worked very well and it only needed to be changed slightly for the serial wing.
In the concept of the TATTOO the airfoil is the key to the good performance, as the aspect ratio is slightly smaller than that of the AERON.
In addition to that, the higher safety level offered by the airfoil made it possible to keep the wing in the computer calculated, performance optimized trim. So no compromises (e.g. higher angles of attach in the wingtips) were needed, to reach the safety level necessary for the certification class 2.
Including a cleaner shape near the trailing edge, these improvements are enabling the TATTOO to offer even a bigger performance level than that of the AERON.
- and that means a lot as the AERON was still the performance leader in the DHV2 class, as the TATTOO was introduced.
 
To reach good performance and stability at higher speeds, the speedsystem is changing the airfoils shape and characteristic:
In normal speed the airfoil is formed to offer best possible thermalling abilities.
When accelerated, the airfoil's shape is optimized for speed and pitch stability.