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berg 9th December 2011 11:34 PM

Rake of a formula fin
May be a dumb question , but I read some brands measure rake at the trailing edge and some at the leading edge. What will be the good rake for a HWR at the leading and trailing adge. Someone with experience?
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nonopr 12th December 2011 07:11 AM

4 degrees rake

Brett Morris 13th December 2011 09:10 AM

Leading edge... 4 degrees is pretty close to normal.

pfaffi 14th December 2011 12:48 AM

rake in degrees of the leading edge depends to the fin outline. A more triangle outline has more degrees at the leading edge than a rectangular outline meaning the same rake. So be careful if you compare different outlines!
But its true the range of the angle of the leading edge is from 2 to 6 deg.
more power at 2 deg, more downwind speed at 6

berg 13th March 2012 06:19 PM

What will be the problem with 0 rake for the hwr, because my virus has 0 rake and upwind its not great?
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