Evolution
The PBV works precise and without delay. “When an asymmetric collapse occurs, valve after valve opens up and aerates the glider, while the other side is optimally filled and flies without problems” – points Strobl out to an observation. And in B-stall the valves open over the whole wing span, during which the glider stays calm at a sinking of 8-10 meters: No whipping, no drifting “but completely controlled, calm sinking”, so Strobl.
At all the safety the fun at flying is not supposed to go short, Strobl reports about the other significant aspect of the specification book. That is why the wing has an AR flat of 4,5 and an innovative line geometry: 2 main lines on the A-level, 3 on B (incl. stabilos) and again 2 on the C-level to minimize the resistance. Four line diameters from 0,95 up to 2,2 mm provide the optimized balance between durability and preferably low cross-section. “As a result there is an agile flying behavior, the EVOLUTON reacts relatively direct to steering pulses and lets itself be turned flatly” so Strobl. Understandable that the EVOLUTION therefore can be moved quickly. When in trim, the wing reaches up to 39 km/h, when accelerated even up to 48 km/h – and all of that at the very high LTF-A-safety-level.