I had not flown for real since the prop disc discussion. This afternoon 3:30 pm to about 5:00 pm, I was out shooting practice instrument approaches with one of my partners in N7764P. When I was saftety pilot, I paid attention to when I could see the prop disc and when I could not see it. Flying west (into the sun), it disappeared at about 1600 rpm. Flying east (sun behind us) it was always visible but nor dark even at 2400 rpm. So the way it is implemented in the fgfs pa24 with the visibility decreasing smoothly with rpm until it disappears completely at about 2000 rpm is a good compromise. By the way, when I was under the hood it was not visible at any rpm. ;-)


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