“plus they no longer run the superchargers on the engines.”
That I did not know. Saw a few take off and assumed they’d kick them in at alt.
The engines do have a note though. I do a lot of work near Republic in Farmingdale NY. The pattern is humming constantly with every type of engine and little attention is paid. EVERY SINGLE TIME a B-17 hit the pattern I was jolted out of my thoughts with: WTF is that!?