From a friend who just emailed me, I thought I would share it for general knowledge.
"On Veteran's Day I kept running out of the house with my field
glasses because there were big radials going by all day long.
I worked at Convair in the late 50's, refurbishing the wiring in
B-36s. Those were BIG RADIALS. With 6 turning and 4 burning,
those things took off at a climb angle like a modern jet
airliner. And most of them never came home with all 6 of those
piston engines still working. When we heard one coming in, we
would run out to count how many props were turning."