Turn.ac material Face PtrTip BallEnclosure 1.0 0.2 0.0 sim/model//material/instruments/factor rotate PtrCtr PtrTip instrumentation/turn-indicator/indicated-turn-rate 20.0 -1 0 0 rotate Ball instrumentation/slip-skid-ball/indicated-slip-skid 21 -19 19 0 0 0.05 -1 0 0