Vaisala Radiosonde RS41-D - Attaching the Unwinder to the Balloon; Figure 6 Unwinder Clip Is Level with the Unwinder Bottom Plate

2. If the clip is bent up, bend it gently back to level position as shown in Figure 6
(page 24).
Figure 6 Unwinder Clip Is Level with the Unwinder Bottom Plate
3.4.3
Attaching the Unwinder to the Balloon
The unwinder must be attached firmly, so that it is not able to twist freely, or the suspension
string might unwind at too high a speed and the radiosonde hit the ground during the
launch. However, the unwinder must be able to swing slightly during the sounding. Follow
the steps and
figures below to attach and align the unwinder correctly when it is attached
directly to the balloon.
1. Pass the unwinder hook through the loop created by the tied balloon neck.
2. Make sure the hook comes out the other side as shown in the figure below. The
unwinder is now
firmly attached to the balloon.
RS41-D User Guide M211952EN-C
24