I have the Velocitek. I have seen 8 knots VMG upwind and 16 knots VMG downwind. I have timed upwind legs and downwind legs and get, pretty consistantly two times faster downwind than upwind. The boat is gybing and tacking about the same angles. That speed is in about 15 to 17 knots of breeze. That means that the straight line speed is about 23 knots with the chute up, based on algebra.

Dan

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