Rs41 unwinder, Table 3, Unwinder properties – Vaisala RS41 User Manual
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User's Guide ______________________________________________________________________
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RS41 Unwinder
The unwinder is specifically designed for use with Radiosonde RS41.
The unwinder is installed to the radiosonde so that it bends the sensor
boom to the correct sounding position, ensuring repeatable results in the
soundings. See
for an illustration of the unwinder.
The unwinders are shipped in the radiosonde package, packed
separately from the radiosondes. This allows the operator to prepare the
balloon with the unwinder and the stick attached to it at a time that is
most convenient. The unwinder is connected to the radiosonde by
attaching the stick to its place and, while it is being attached, the stick
bends the sensor boom to the sounding position.
Table 3
Unwinder Properties
Material of the string
Non-UV treated polypropylene
Tenacity
<115 N
Length of the string
30 m
Unwinder weight with stick
24 g