Hi Tim
After careful study here are my revised data points.

The difference is 187 ft when stationary on the ground

After reviewing the altitudes of both gliders at the same finish
line, time stamp 20:26 the difference is 40 ft
.. Glider A dove 40 ft lower at the finish at time stamp 20:22 altitude
131 ft
B finished at the same finish point at 20:02 altitude -16 ft -187 ft
= 171 ft real altitude.

At the start, B has the advantage on the the time mark of 14:00 of
plus 187 ft

Restating the data points
A at point 13:46 had a speed of 52 kt and an altitude of 2333 ft
B at the nearly the same point at 14:00 had aspeed of 62 kt at an
altitued of 2297 ft plus the 187 logger differencial fo a total of
2484
for B a 151 ft advantage

The total advantage for B was 111 ft. ( 151 ft -40 ft) plus carring
10 kt more energy at the start and finishing also with a 5 kt higher
speed
but B also flew faster by 34 seconds.

Udo

Udo,

I think I have the answer for you. *The difference in your loggers
gives you an additional 187 feet of altitude so you actually had 13.4%
more energy to expend to achieve the 9% faster speed. *Look at the
altitudes after you each land.- Hide quoted text -

- Show quoted text -