That of course does the job, Keith. And when made well, is pretty reliable. But my question is how easy it is to make really small trim changes? Do you use some angle measuring tool to verify the changes?
Oh, and Happy New Year!
Lauri
Dennis - and Happy New Year to you too. It is always good to hear from you.
You have a good question regarding how to accurately make adjustments with the horn that I have pictured. (It is the horn like Bob McDonald makes discussed by Jim Hoffman above.)
Hopefully, the picture below shows the flap gusset between the flap and the fuselage. When the bolt is loosened, one flap can be clamped to the gusset. The other flap can be moved in very small increments. I feel that I can make accurate adjustments with the movable flap trailing edge in probably 1/4 mm increments or less in the desired direction. It solved a slight outboard wing high problem in level upright flight in two flights when I started flying the Martin Baker last Fall. The total adjustment was less than 1/32" at the trailing edge of a flap. A lot nicer way to "tweak" the flaps rather than twisting the horn which has proved disastrous for me on several occasions with solid, one piece horns.
I think what you and Howard are discussing is a very elegant method to enable flap tweaking. So is the Paul Walker system, but I wonder if the Walker approach allows too much flex from right to left flap under different loads. Yes, it is better than just using split or separate horns, but still allows flex in the system from one flap to the other. Any unnecessary flex between the flaps is not good.
Keith