At 17:57 12 June 2018, wrote:
On Tuesday, June 12, 2018 at 10:44:01 AM UTC-5, Tom Kelley
#711 wrote:

https://www.onlinecontest.org/olc-3....ightinfo.html?
dsId=6514812

Flight details
Points for the flight 279.92
scoring distance 783.79 km
Speed 313.51 km/h
Duration 02:30:00
Scoring class double
Scoring start 23:56:30
Scoring end 02:56:45
Index: 116.0
Club Perlan Project
Date of claim 10.06.2018 03:26:24

Best. Tom #711.

So how did they get around the plane's VNE of 280 km/h? Can't
be a
tailwind because the trace shows speeds of up to 380 km/h going
both
Northbound and Southbound.


True airspeed goes up with altitude at a rate of ~2% per 1000'.
So, in wave at 20,000' the true airspeed is ~40% higher than
the indicated airspeed... 280 km/h indicated = ~ 392 km/h in
true airspeed at 20k ft.....

RO