My workaround:
In VR there’s a (sim) bug where in external view it shakes the whole world, not just the plane. The game defaults to some vibration at low RPM. To get rid of it, add [low_rpm_shake_scalar = 0] to the [PISTON_ENGINE] section of engines.cfg. It’s a scalar, so 0=no shake, 1=default, or you can reduce it (somewhere between 0->1).