RFSchaller
Well Known Member
Has anyone had trouble adjusting the trim speed on their RV-12? It was very touchy when I adjusted the pot, but seemed to work fine for about 20 hours. Then the trim tab stopped working completely. The motor works when connected to a 9V transistor radio battery (ULs fly like that with these servos if they don't have an electrical system) and pulls about 200 Milliamps, but when I hit the trim button to move the tab I only get 0.2 Volts and no movement. With the trim at full travel (no current flow) I get about 9.6 Volts. I find it hard to believe the control circuit just died after only 20 hours, so I'd like to know if anyone else encountered this. Next step is to pull the glareshield and start poking around the trim adjustment. In a worst case scenario I'll bypass the speed control circuit.