I have an airfoil connected to two supporting uprights, and each upright has a load cell to the front and to the back, between the bottom of the uprights and a test mount surface. From this system I would like to attain a decent approximation of the down force of the system subject to an air current.
The thing puzzling me is that I figure it might(?) be possible for the drag forces to impact the readings of the load cell (due, perhaps, to some resulting torque); if there's any merit to that concern, I'm curious how the physics works out such that I could have a reasonably accurate reading of the down force, unperturbed by any lateral/angular forces involved. If not, an explanation as to why that's so would be greatly appreciated.
As an aside, I've only recently made my way through set theory, calculus and linear algebra over the last year, but I haven't had any time to bone up on physics just yet (that's coming up soon!), so it's possible my question is pretty elementary. My apologies if that's so. Also, I suspect there's more physics involved than engineering, which is why I went with the physics exchange - I hope that was reasonable.
At any rate, some pointers would be greatly appreciated, as well as any references to the literature that would apply to this problem.