SUNDAY, DECEMBER 17, 2017

Reflex Profile

reflex-steering-enWhat Is A Reflex Profile

Simply put, it is an aerofoil which – in case of decreased angle of attack – automatically tends to have it increased again. In other words, it always stays in neutral position regarding its load. On drawings it’s an aerofoil that has its tail turned upwards :)

One of the most distinct features of the paragliders equipped with reflex airfoil as opposed to classic paragliders is their substantially increased stability on high speeds.

As always in nature, nothing is for free. In case of longitudinal self-stability you pay for it with lesser lift coefficient. It means that in order to get good glide ratio you have to choose proper wing shape and aerofoil thickness. With paragliders there comes additional problem, namely big forces needed to steer it. These are main reasons why you don’t find full reflex aerofoils among free-flying paragliders. In our designs we solved these problems through carefully adjusted rigging as well as introducing several new solutions like ALC and TST systems.

With PPG or PPC canopies worse glide ratio is not that problematic, because there is always an engine to help, while self-stability means that even in turbulent air you can feel completely safe (and fly with hands in your pockets :)   Considering limited manoeuvrability of a glider burdened with paramotor this is an extremely desired feature. Last but not least, with such big margin of stability reflex canopies can be safely flown at much higher speeds than classic paragliders.