ORIGINAL: F86_SABRE
The Roo airbrake has some flexing if pressed backward (simulating air pressure). Airbrake moves around 1/2" - 3/4" backwards.
The Robart type horn (1.25" high type) is situated approximately in the airbrake centre and is connected to the servo by a 4/40 type rod which is about 3" long.
Well a picture says a thousand words so are included.
Should this flexing of the airbake be of any particular concern?
Thanks in advance
Reuben
Move the horn up so that the horn connects to the linkage over the center off the hinge line. Most of that play and movement will go away. You will also use a lot less servo throw to get it down.