Yesterday afternoon, the lovely bride and I were sitting in our front room talking. I was saying something, and stopped. She looked at me, saw my face...asked what was up.
I said "Radials.....more than one....more than two....B-17!" and out the front door we went as he went directly over the house.
I spent so many years listening for the supply plane to our installation in Colombia....DC-3....and learned early on the difference between one and two engines.....you can hear them out of sync. Then more than 2, you can hear them al coming in and out of sync. Had a B-24 here 3, 4 years ago with the B-17, and I can hear the difference between the two. Can't explain it....