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Swing Nexux C-bridge acceleration

Posted on Mon, Jun 15 2015 09:45:40

Todays issue of our Info-letter deals with performance optimisation during accelerated flight.





Performance-oriented flying means flying fast. This is especially the case in competitions. The need to fly as fast as possible in competition has given rise to a special flying technique: Using the rearmost main lines, instead of the breaks, to stabilize the canopy while using the speed bar.

For some time now competition wings of most manufacturers have featured rear riser control possibilities on the B- or C-risers and these are now even becoming common on lower EN/LTF category wings. These globes, loops or grips assist the pilot in using the rear risers to stabilise the wing by manipulating the angle of attack while on speed bar in turbulence. This way, the pilot is given the possibility to prevent threatening disturbances (front collapses) without having to release the speed bar. Further, steering input via the breaks is not recommended while on speed bar, as application of breaks while in this condition can destabilise the profile (concave profile).





With the new EN-C wing NEXUS, SWING has further optimised the concept of rear riser control by the design of a connecting bridge between the tops of the split C-risers. This C-Bridge enables short, impulsive inputs to both C-risers to stabilise the wing and for correcting the direction without loss of performance. Furthermore, as designer Michael Nesler points out, the C-bridge also enables enhancement of gliding performance in accelerated flight. SWING has made lots of tests that conclude, slightly pulling down the outer C-riser, when on speed bar, improves glide ratio by up to 0.5.

The C-Bridge also prevents twisted C-risers during ground handling and the launch phase, another positive side-effect.





What can be done flying a Nexus has already been impressively shown by the SWING Team-Pilots. Not least by Erwin Auer with his 226km flight from Hesselberg to the Black Forest or Didi Siglbauers 263.5 km FAI-triangle from Grente takeoff. You can re-live this flight in 3D here.