On Wednesday, May 7, 2014 9:35:46 AM UTC-4, Mike the Strike wrote:
On Wednesday, May 7, 2014 6:28:41 AM UTC-7, Mike the Strike wrote:

...now redo your calculations while flying through 8 knots of sink.







Mike



..and calculate the height loss while making a 180-degree turn. Taking the 12.8 seconds just mentioned at 800 feet per minute gives you a height loss of 170 feet from the airmass movement alone, plus whatever you add for the glider itself. Safety margins in severe sink disappear frighteningly quickly.



Mike

Now throw in wind shear and tailwind component when failure to anticipate leads to turning in the wrong direction.
Double AARRGGHH!!
UH