The recommended parachute with big
balloons (> 300 g) is Totex type 5710-5 (Vaisala code 15045). See option 1 in Radiosonde RS41 optional
accessories.
The parachute has an elastic ribbon loop below the spreader. Attach the unwinder to the
loop by pushing the hook out the other side in the same fashion as with the folded balloon
neck.