We (Greater Boston Soaring Club) had our first Spectra "glider flinging"
session today and were surprised that we saw no altitude improvement
after switching from steel cable. The winds were not favorable and our
heights may improve in time. .... But that's not the question.

We have the option of launching from either asphalt or turf. From a
Spectra wear point of view, which would be preferred?

Tony V. LS6-b "6N"