PDA

View Full Version : Rake of a formula fin


berg
10th December 2011, 12:34 AM
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?
Like to hear

berg

nonopr
12th December 2011, 08:11 AM
4 degrees rake

Brett Morris
13th December 2011, 10:10 AM
Leading edge... 4 degrees is pretty close to normal.

pfaffi
14th December 2011, 01:48 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
br
pfaffi
www.pfaffi.at

berg
13th March 2012, 07:19 PM
What will be the problem with 0 rake for the hwr, because my virus has 0 rake and upwind its not great?
Like to hear

Ewoud