gps-speedsurfing
Martin van Meurs

  • donderdag 16 juni 2005
  • Netherlands


  • Max. 2 sec.
  • 65,7kmh
Gemiddelde snelheid
60,46  ( 63,7 62,9 59,5 58,9 57,3 )
  • 100 m run
  • 64kmh
  • 250 m run
  • 62,2kmh
  • 500 m run
  • 57,6kmh
  • Nautische mijl
  • 0kmh
  • 1 uur
  • 0kmh
  • Afstand
  • 0km
  • Windsnelheid
  • 10 - 17knots

Very gusty wind and mostly barely enough to get planing. I chose the wrong sail anticipating for more wind that never filled in.

Decided to sart checking the polaires VMG data (you can find it on GPSAR) to get the fastest angle in different windspeeds. I expect the fastest angle in high wind will be somewhere around 135-140 degrees but time will tell. Today the fastest angle on average was in between 115-120 degrees. Not really broad which was not surprising given the fact that the sail was underpowered even in the gusts.

I also started checking my gybing speed. I didn't concentrate on gybing and ended up with mid turn speeds of around 12 knots (just over a third of the maximum speed just before going into the gybe). This can become a fun feature in the future. I can't wait to check on powered up gybes in really strong winds. Really funny to see how fast the board decelerates going into and accelerates after a gybe. The fastest 1000 meter was 54,3 including a gybe, not much less than the fastest 500 meter without a gybe. Speed stays high very long, during the sail shift it drops just for a second and it accellerates up to near peak speed very quick again.

This spring isn't really good this year so I also started focussing on using bigger fins and see how they influence average and topspeed in gusty conditions. It turns out the 38 is just as fast as the 33 until the set gets way overpowered. I expect the fin to be capable of 70+km/38+knot speeds which I wouldn't have believed before. As soon as the conditions are right I'm going to perform a proper test to check the highest possible speed when it's barely possible to keep the board on the water. It will be interesting to see how much you can gain with a smaller sized fin in fully (over)powered situations.
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