Dudek Atak
Dudek Atak in actionDudek Atak in actionDudek Atak - Color Schemes

Atak

Sport and Cross country wing

Product Description

Dudek Atak

You love racing. You fly a lot and can master active steering of a high aspect ratio wings. Your only wish is that they were a bit more stable on speed, even as it is rather impossible.

Well, truly there are no miracles, but Atak has everything that could have been achieved. You will be pleasantly surprised with its stability on full speed glides and in turbulent thermals.

Design

Atak is a paraglider that has been under development and testing since 2005 (it was then known under mysterious name E255). It was designed from the scratch along strict guidelines, with application of our PPG wings experience – they do show extraordinary stability at maximum speed after all. In the effect, Atak features unique combination of high-speed stability with great performance at trim speed.

Moreover there are several details that will facilitate everyday use – for example differently coloured stabilo lines (they will be easier to find when coping with a cravatte, so that you won’t be slowing down the entire wing with a brake). There are valves in the stabilos too, diminishing probability of a cravatte and automatically getting rid of dirt from inside the wing.

Purpose

Atak was designed for experienced sport, XC and even competition pilots. It is not intended as a PPG wing, even as PPG test flights were successfully made. There are absolutely no problems while winching.

Performance

Atak is equipped with a trim system with unsurpassed effectiveness, radically changing the wing’s nature. With trims closed it is soft and sensitive, performing great in weak thermals, while with trims open it becomes tough, hardly affected by turbulences and collapses.
Irrelevant of trim setting, Atak always retains a tendency to auto-center encountered thermals.

The wing is best performing with trims set on marked line – in this configuration its finesse is approaching 10 ( see a graph ). The best L/D ratio calls for minimum brake application – not a hard thing because of their great eficiency. Pilot must always remember that any application of the brakes distorts the airfoil. Nevertheless, even as slight application of brakes (in the middle trim setting) spoils some of the finesse, in the same time it reduces sink and forward speed, thus creating best configuration for thermalling.

Completely closing the trims is advised only when fighting in weak and narrow thermals. Sink speed is admittedly higher than in middle trim setting, but due to increased sensibility of the wing and decreased speed it is much easier to locate and use the lift.

Fully opened trims give reasonable L/D ratio, but it is better than middle trim setting only at speeds exceeding 50 km/h. That’s why instead of flying full speed bar in middle trim setting it is better to open trims and only then use the upper half of the speed bar. On the other hand, if you are going to use just the lower half of speedbar range, there is no point in opening trimmers. It is justified only when there is more than 2 – 2,5 m/s sink combined with head wind of at least 10 km/h. Opening trimmers with full speedbar can be used while escaping strong sink too. In normal conditions, when you are not racing and there is no need of 60 km/h speed it is best to use middle trim settings. In turbulent air a flatter of trailing edge can happen, that can be easily fixed with putting slight load on the brakes.

Sink of 2 – 2,5 m/s is best flown with middle trim settings and half speedbar. Best performance against 10 km/h headwind calls for middle trims and less than half speedbar. Fully opened trims and more than half speedbar are reasonable only against 20 km/h headwind and 1 m/s sink. In other words, 10 km/h headwind and 2 m/s sink justify this configuration too.

Flying with tailwind and in lift should be done with slightly pulled brakes. Wing-overs are very dynamic, given very efficient brakes with short travel. Maximum speed (open trims + full speedbar) amounts to 60 km/h, while the canopy remains very stable.

Atak shows overal high stability proven in test flights realised in turbulent air, including lee-side! Even in most lively atmosphere paraglider always stays over pilot’s head – a feature distinguishing all wings from Dudek Paragliders.

Name/size Atak 23 Atak 25.5
Certification - -
Number of cells

75

75
Surface area (flat) [m2]

23,0

25,50
Surface area (projected) [m2] 19,80 21,95
Span (flat) [m] 12,23 12,88
Span (projected) [m] 9,90 10,42
Aspect ratio (flat)

6,50

6,50
Aspect ratio (projected)

4,94

4,94
Sink rate [m/s] min = 1,0 ; trym = 1,1-1,3 ; max = 2,5
Speed [km/h] min = 25 ; trym = 35-42 ; max = 60
Max cord [cm] 232,20 244,50
Minimum cord [cm] 47,00 49,50
Distance pilot to wing [cm] 811,00 854
Total lines lenght [m] 382,00 402
Weight range * [kg] 70-90 85 – 105
Weight of the wing [kg] 5,8 6,2
Lines Technora (non-sheathed) 0,5 & 0,8 & 1,1
Technora (sheathed) 2,3,
Cousin (non-sheathed) 0,9
Fabric SkyTex Evolution 40 g/m2
SkyTex Classic 40 g/m2
SkyTex Hard 40 g/m2
SR Scrim, SR Laminate 180 g/m2

* include equipment: harness, wing and pilot itself


Polar Graph

 Polar Graph

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