Gestalt said...
are you using the same foils as c3?
the foil is a profile (or cord =22cm) I took from the MCF 17CM , then used a similar design as the c3 slingshot where its thicker at the base
the whole idea of showing you how to make a fin is to show the basics on how its done, from there on its up to you to modify it
the reason I decided to design this fin is, I had a MFC 15CM, to my liking It had to much rake and was too loose of the wind , so I lifted the angle to 50deg and to a 17cm
5deg and 2cm made all the difference but I wasn't getting enough lift, so I had a look at the c3 and they were thicker at the base for 25mm with a 5mm difference at the tip(MFC 1mm)