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Air Design PURE 3

The Next Level EN/LTF D

Air Design PURE 3

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Some might have wondered when the other sizes of the PURE2 were being released.

During the test and development phases for these other sizes, we were able to find many new innovations and improvements. These improvements have enabled us to make the PURE2 an even better wing. It was a difficult decision, but we have elected instead of certifying the remaining sizes that we would recertify the PURE2 M and evolve it to the next level. Enter the PURE3.



•    Agility. Even more agile handling and reduced brake pressure, allowing the wing to now turn with a more constant and balanced turning arc. Centring within the thermal core is now far more efficient, enhancing and improving climbing potential.
•    Efficiency. Improved gliding in moving air. This is noticeable especially in headwind and unsteady air environments. The canopy is more neutral, resulting in better glide, now climbs more effectively with reduced sink rate.
•    Performance. In fully accelerated mode we have been able to obtain an advantage of +0.5 glide-angle.
•    Greater stability. Due to the improved neutral flying characteristics, flying has become less stressful in challenging conditions.
•    Speed. More top speed. The PURE3 is around 2-3kmh faster fully accelerated.
•    Enhanced Safety. A newly designed riser set improves the safety potential. Accelerated collapses are remarkably easier to control.


Design Goals

Our primary goal was to realize a glider with best performance within an aspect ratio of 7. Therefore, the PURE 3 is a complete 2-line conceptual construction. Just the C-lines are collected by an additional main line (incorporating a 2-line construction with 3 line-levels). With this design development, the advantages are increased acceleration ability and reduced collapse behaviour, resulting in more overall balanced flying characteristics.

Outstanding features of the PURE 3 are the exceptional performance, perfect glide in head-wind, increased climb rate in moving air and a flatter polar curve – especially under acceleration. You’ll now find greater stability over the entire speed range.

The handling is what you would find to be synonymous with AirDesign – agile and variable. Whether you choose to turn flat, or tight and steep, the PURE 3 is at home with you every step of the way, and responds exceptionally to even the most gentle of pilot inputs.


Design Details

The PURE 3 features a more pronounced shark-nose, double 3D-cut top-sail with flat seams and a single 3D-cut bottom-sail.

A special 2-line aerofoil in combination with a detailed and ingenious inner construction (with v-ribs, straps and cross supports) ensures maximum stability.

VORTEX HOLES® at the tips and outside cell trailing edges work to diffuse vortex drag by releasing redundant pressure, which is further improving performance.

A redeveloped line layout (in some cases spanning over 4 cells without line attachment points) greatly reduces line consumption.

Polyamide rods are strategically positioned at A and B sections, with sufficient spacing to allow you to pack more ergonomically.

Comfortable and precise B-steering handles.

Tips and Tricks

“Big Ears” with B-Line

By pulling down the most outer B-line the tips make a partial B-stall, which gives a very similar result compared to doing it with the A-lines. To release, just put the B-lines up again. The advantage by doing so is that the ears are more stable and have no tendency to shake.




When is a 2-liner a 2-liner, a 2.5 or 3-liner?

If you are only looking at the number of line levels, the categorisation of a 3-liner would be correct, but in case of the PURE 3 is something completely different and stands out on it’s own.


The PURE 3 is a complete 2-line construction. Rearward positioned line-tabs, 2-line aerofoil, extended distance between attachment points, inner-structures...

As a result, it wouldn’t be appropriate to place the PURE 3 in the same box as conventional 3-liners. That's why we call it as a 2-line construction with 3 individual line levels. By incorporating two systems in one, you obtain the best of both worlds.

The fact that there is a C-Line attachment point in the middle of the wing does not change this fact. Furthermore, this level of lines adds more possibilities for tuning the wing best for accelerated flight, and gives a better control for the respective EN test manoeuvres.

The B-Line steering works effortlessly because it is real B-line control, and the handle is neatly integrated into the design of the B-riser.

The PURE 3 concept implements the transfer of technology and performance from a competition class style construction into the EN-D class with an innovative line layout and all state-of-the-art design features.


AREA FLAT (m²) 22,57 24,10 26,21
AREA PROJECTED (m²) 19,12 20,42 22,21
SPAN FLAT (m) 12,55 12,97 13,52
SPAN PROJECTED (m) 9,93 10,26 10,70
ASPECT RATIO FLAT 6,98 6,98 6,98
ASPECT RATIO PROJ. 5,16 5,16 5,16
CELLS 70 70 70
TOTAL LINES 222 222 222
LINE DIAMETERS (mm) 0.5/0.7/0.8/1/1.1/1.3/1.5/1.7
WEIGHT (kg) 5,6 5,9 6,3
V-TRIM/V-MAX (km/h) 39/60 39/60 39/60
TAKE OFF WEIGHT (kg) 80-95 90-105 100-120


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