No-one's mentioned the sound of silence when the master switch is turned on. I fly two different PA28's, one with suction-driven AI and DI plus electric turn & slip; the other with all three instruments suction-driven. It's the latter that is quiet when master goes on of course but the silence always gives me pause for thought until I twig that all is normal. Yet in the two Chipmunks I also fly regularly neither have electrically-driven instruments and the sound of silence never perturbs me.
Interesting conditioning my brain has had
