Category: Horizontal Stabilator

The horizontal stabilator is the horizontal control surface at the back of the airplane. Unlike a separate fixed horizontal stabilizer and a moveable pair of elevators, the RV-12 employes a “stabilator” which is a combination. The whole assembly moves. I started on the spar box, the structural spine. My RV-12 empennage kit is down to…

The ASTs are the Anti Servo Tabs. Completely different than what I thought they were. When originally looking at the plans, I thought they were trim tabs, i.e. for trimming pitch. The RV-12 uses a sensitive horizontal “stabiliator” – the entire surface moves rather than a more traditional horizontal stabilizer + elevator design. So these…