"Darrell" wrote

I just got an email from a friend who just made LtCol. I remarked that now
he could wear the wheel hat with the "farts & darts" (clouds with lightning
bolts) on the visor. He replied that the Air Force no longer uses the wheel
hat. When did that start?

People stopped wearing them in about 1975, and I think they stopped being
issued in 1993. Probably in concert with the McPeak uniform change.