On Sunday, April 12, 2015 at 10:48:40 AM UTC-4, wrote:
VNE with altitude.

If your VNE changes with altitude, it will be listed in the glider's Manual, read it and quit trying to guess.

Todd Smith
3S

"The IAS at which never exceed speed (VNE) is reached
decreases with altitude. The glider flight manual (GFM)
should include a table, such as the one shown in Figure 4-11,
that details how VNE should be reduced with altitude. These
figures vary from glider to glider; therefore, pilots should
always refer to the manual specific to the glider they are flying,
which should show a chart similar to the one in Figure 4-11."

*should*

Source: Glider Flying Handbook, Page 4-3

http://www.faa.gov/regulations_polic...apter%2010.pdf