RAST on launch
When the glider is being inflated, RAST slows the inflow of air into the rear section of the glider. The front section of the profile, which is relevant for air-flow, develops very quickly and the glider starts to rise up from the ground immediately.
As inflation continues, the rear section of the canopy is inflated only slowly, which produces very harmonious and even launch behaviour. The glider won’t overshoot or launch the pilot unintentionally – and won’t dive after launch!