It holds a "spare" tube- it is not connected to anything, just tied.
That is if your probe is a twin probe.

Andy
wrote in message
...
On Mar 28, 5:19?am, Gary Emerson wrote:
I've got a Ventus b. ?On the top of the fin (under the horizontal
stabilizer) is a single tie wrap that appears to hold something to the
underside. ?Just curious, anyone know what that item might be? ?Seems to
high to be a support for the TE probe tubing. ?There is no tail tank
installed. ?Antenna perhaps???

It could easly be to support the TE tubing. Normally the tubing is
routed up from the mount and then back down through the fin. This
upward route is to prevent water from getting into the tube. If the
water has to go up as soon as it gets into the mount then it is not
likely to accumulate in the tubing.

Robert Mudd
Moriarty, New Mexico