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