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Trimming the stabiliser angle of attack.

Posted: Sun Aug 02, 2020 7:05 am
by fluidity
I'm making my own foils to get into this sport and today is a rare no-wind day, I found that my DIY wings need a tail wing angle of attack somewhere between 2º and 4º with some push-glide testing and jog-next-to-the-board seat of the pants testing. More 3D shims to print to get my options in the right ball park!

So I'm curious, for most of you on factory foils, some professional and DIYers here, how do you adjust your stabiliser if you think it's wrong? I looked up the formulae for lift and like drag, it's a square relationship, i.e. double the speed and both drag and lift quadruple.

Is it having stability with a particular fixed front foot position ? Or is there another way to be sure you have the right tail angle?

I could put this in hydrofoils but with the strong power/depower cababilities of wind wings I'm thinking the answers might be different than for some other hydrofoil applications.

Whoops! Toby, if you're reading this I meant to put it in wingsurfing :-?

Re: Trimming the stabiliser angle of attack.

Posted: Sun Aug 02, 2020 4:10 pm
by grigorib
I shim my stabilizers for couple degrees one or another way to correct mast position/stance I can’t move. The difference in flying is negligible

Re: Trimming the stabiliser angle of attack.

Posted: Wed Aug 05, 2020 6:32 pm
by Mossy 757
There are some insights on Mike's Lab's website: http://www.mikeslab.com/instructions/

And Delta Hydrofoil has some videos about how to think about this question: