H. Miranda World Record technique:

1. Fill wings with water

The Jantar that Horacio flight, DIDN'T HAVE WATER!!!!!

They flew using the 1 and 2 wave of cordillera del viento starting at
5000 meters (16666 ft) climb to 6000 m (20000 ft) and finish at 4400
meters (14666 ft). His maximum ground speed was 413 km/h (223 kts). I
have the IGC file for this record. I can e-mail you if you wish. The
jantar VNE is 275 kph (148 kts) at sea level.

Last year I flew with Horacio in the same triangle in a IS-28B2. Our
maximum ground speed was 330 kph (178kts) flying always at 160 kpn (86
kts) IAS, that is a little less that the IAS VNE for this altitude.
The VNE at sea level for the IS is 220 kph (118 kts)

Best regars,

Luis Briones