Wow...I can't believe how many ERAU grads there are on this forum.

With the Anhedral stab I don't belive that we can"resolve" the areas like a vector and add some in the vertical plane. The anhedral stab works differently from the standard because some of the surface is below the area of the wing downwash. We have to avoid trying to invent theory purpose built to rc aircraft, rather use fullscale design principles and methods to explain what some of our experiments tell us.

Anhedral stabs on full scale are usually because the designer is trying to avoid unfavorable downwash or jetwash and has no other choice structurally than to "lean" the stab away.

I really doubt if the tiny fin is actually impacting longitudinal airflow due to the spiral propwash as both Electrics (big mass of air being moved slowly) and Glow (small mass moved quickly) both seem effected similarly. Additionally, do the improvements go away when you trottle back (as in a downline)?

Someone should build a small smoke tunnel, say 2'x2'x2' and run some experiments to visualize the effects....any takers?

Colin.