blueplanetsurf said..The difference between angle of incidence and angle of attack:
This is some good information to foils. I often have people asking and talking about wedging their Naish Hover to get the Fuleage parallel to the deck. Somehow, someone has tried to make this a universal trimming guide. Which IMO is incorrect for the following reasons;
1. All foils are different, so how could they possibly all have the same angles of Incidence & Attack.
2. Naish purposely build their Hover boards to suit the Thrust Foils. They have done the work to ensure it is as technically correct as possible.
I have played with wedges on my Naish Hover's quite a bit as I like to try and understand things not only theoretically, but also practically. Against my understanding of the theory, I tried a 4mm wedge on my Naish Setup and hated it. Then stepped down in 1mm increments until I got the my 1mm Wedge. The 1mm Wedge was rideable to a degree, but it's impact of high speed riding and power was amazing. Just 1mm made my gear so hard to control at speed, that I have not ridden with any wedge since nor will I.
Playing with the angles will work in different ways, but like everything, if you increase low speed lift (angle of attack), you are going to sacrifice control (especially at speed). My opinion is you get far better trim and control over your board by moving the mount fore and aft in the tracks depending on conditions and rider weight.
Wedges are an inexpensive way of trialling things, and possibly something you may use on a crappy day (1mm), but I honestly think after some time you'll choose to use the factory angles.
Obviously, on a modified board, wedges may help to achieve the intended foil angles. I suggest working out what these angles are of a production product first, then aim to try and match them for the appropriate sized board.
Ride safe,
JB