Minimum number of flights for winch sign off?

On Tue, 13 Feb 2018 09:21:00 -0800, son_of_flubber wrote:

Here's another interesting winch site: Edensoaring in the British Lake
District. Its a shortish winch-only site about 2.5km from the closest
soarable part of the Pennines. If the hill is working in a westerly, the
wind is pretty much fully cross-wind and in an easterly the rotor tends
to set up above the field.

https://www.youtube.com/watch?v=PcCzolzkYQ8

In a westerly launch failures are unusual because you turn 135 degrees
right, INTO the wind for abbreviated downwind and base legs. Why?
Because there are trees along the east (uphill) side of the strip.



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